The Emperor’s Hand

Eleven seconds is a long time when you are falling.

The drop pod’s interior was a coffin of ceramite and restraint bolts and the particular darkness that comes from being inside something that is, in the most literal possible sense, a bullet. Five bodies in five crash-harnesses, each of them in armour, each of them held in place by clamps rated for an impact speed that the human language had not bothered to develop civilian vocabulary for, because civilians did not do this, because this - this screaming vertical plunge through atmo with the hull glowing cherry-red and the retro-thrusters counting down from numbers that were, in a purely mathematical sense, still too large - was not something a sane species would have designed a vehicle to do.

The pod’s machine-spirit chanted. A single tone, repeated at half-second intervals: the litany of descent, a sound that existed in the precise register between prayer and targeting solution. Brother Torek of the Salamanders was murmuring along with it. Brother Ghael of the Raven Guard was silent, had been silent since they’d boarded, would likely remain silent until something needed killing, at which point he would become articulate exclusively through violence. Brother Cassar of the Black Templars gripped his chainsword’s hilt with the steady pressure of a man who had made peace with gravity and its consequences. Brother Maren of the Iron Hands ran a final diagnostic on his augmetic arm, the actuators cycling through their range of motion with a sound like small bones cracking.

Sergeant Kael of the Imperial Fists watched the altimeter.

Three seconds.

The retro-thrusters fired. The pod screamed. The world hit them, or they hit it - the distinction was theological, and Kael was not, at that particular moment, interested in theology.

The flagstones of the monastery’s outer courtyard cracked in a radial pattern that would have been beautiful from above, a stone flower blooming outward from the point of impact, and the shockwave rolled through the surrounding structures with a bass concussion that the local Planetary Defence Force sentries - fifteen hundred metres away on the city’s eastern perimeter - would later report to their commanding officer as seismic activity, magnitude uncertain, origin the monastery district, and the commanding officer would look at them with the expression of someone who knew exactly what had fallen from the sky and did not consider it seismic so much as deliberate.

The assault ramp blew outward on explosive bolts. Dust. Noise. The sudden bewildered silence of a world that had just had something fall on it from orbit.

Kael was first out.

Ceramite boots on broken stone. Auto-senses cycling through spectral filters - thermal, low-light, electromagnetic - as the dust resolved into architecture. The bolt rifle swept the courtyard in an arc so practised it had become involuntary, the same way breathing was involuntary, the same way the heart beat without being asked. He did not think about the sweep. He thought about the monastery’s layout, which he had memorised during descent and which was already resolving around him into physical space: cloisters to the north, data-vault to the east, the magos’s laborium in the sub-levels, accessible through a service stairwell behind the refectory. Three words across the vox, sub-vocal, compressed into micro-burst: North. Clear. Move.

The kill-team moved.

They moved the way a blade moves through an incision: fast, precise, causing exactly the damage they intended and no more, which was its own kind of terrifying.

The Ork scouting party was in the northern cloister. Twelve Boyz - an advance element from the vanguard that had been probing the monastery’s perimeter since before dawn, sniffing around the walls with the restless aggression of predators that had not yet decided whether this particular prey was worth the effort. They had decided. They were inside, smashing reliquaries, pulling copper wiring from the walls in long festive streamers, one of them urinating against a column that had been carved nine hundred years ago by a mason whose name was still legible in the stone at its base.

Nine seconds.

Kael’s bolt rifle spoke twice. The mass-reactive rounds crossed the cloister at a velocity that made the intervening air irrelevant and detonated inside the first Ork’s torso with a specificity that was almost medical - the round penetrating the chest cavity, the micro-detonation cracking the ribcage outward, the hydrostatic shock liquefying organs that had, a fraction of a second earlier, been engaged in the business of keeping something alive. The second round took the Ork beside it through the skull. Ghael was already past Kael and moving down the left colonnade, his combat knife doing work that the bolt rifle’s report would have complicated - the Raven Guard killed quietly, efficiently, with a professional discretion that was not mercy but economy. Torek’s flamer lit the far end of the cloister with a wash of promethium that was brief, targeted, and absolute. Cassar’s chainsword opened an Ork from shoulder to hip with a sound like wet timber splitting. Maren’s augmetic fist closed around a greenskin’s neck with the precise, calibrated force of a mechanism that knew exactly how much pressure a vertebral column could sustain, and applied slightly more.

Kael stepped over a dying Ork. He did not look down. The Ork was not worth noticing. The Ork was terrain.

Nine seconds. Twelve dead. The kill-team moved into the monastery without breaking stride, and behind them the cloister settled into the silence of a place where nothing was alive to make noise, and the column with the mason’s name stood untouched in the middle of it all, the carved letters filling slowly with a fine mist of blood that would dry, in time, to the colour of old rust.

Their mission was specific and non-negotiable: retrieve a Mechanicus magos and her research data from a fortified monastery before the Orks overran the region. The magos was working on something the Deathwatch briefing had classified at a level the sergeant was not cleared for, which told him everything he needed to know about its importance and nothing about its nature. He did not need to know its nature. He needed to know its location - sub-level two, laborium west - and he needed to know the magos’s name - Lyren-3 Cathek - and he needed to know how long she required to secure her data for transport, which was, according to the briefing’s optimistic estimate, between forty and ninety minutes.

The local PDF garrison - fifteen thousand soldiers across six regiments, armed with lasguns and determination and not much else - was not part of the mission. The city of four hundred thousand was not part of the mission. The mission was the magos.

Everything else was terrain.

Pull back. Wide lens. The planet seen from a height that rendered the monastery a pale square in a grid of streets, the city a grey stain on the yellow-brown of agri-plains, the plains themselves a texture, a suggestion, a skin stretched over the bones of a world called Kethara’s Reach that had never, in its four centuries of Imperial habitation, been important enough to defend properly or remote enough to be left alone.

Agri-world. Tithe grade: Exactis Prima. Population: four hundred thousand in the capital, another six hundred thousand scattered across the outlying grain-districts in settlements too small for names and too productive to abandon. Garrison: fifteen thousand PDF across six regiments, equipped to a standard the Departmento Munitorum classified as “adequate” and that the soldiers themselves classified with the vocabulary of people whose weapons jammed in cold weather.

Colonel Vasht commanding.

Vasht was a career officer who had spent twenty-two years being too competent for the post she held and too unlucky - or perhaps too honest, or too disinclined to cultivate the right patrons, or too obviously better than the people who decided promotions - to escape it. She had thick hands, a face that looked like it had been designed for a larger skull and compressed to fit, and a tactical mind that her superiors consistently underestimated because it was housed in a body that did not look the way tactical minds were supposed to look. She had never commanded anything more significant than a garrison. She had never lost one, either.

The WAAAGH! vanguard - eighty thousand Orks with armour and vehicle support and the unmistakable, bone-vibrating, horizon-darkening momentum of a species whose approach to warfare was essentially tidal - was sixteen hours out and coming through the agri-plains at a pace that suggested they were not in a hurry.

This was worse than if they had been. Orks who were not in a hurry were Orks who were confident.

Confident Orks tended to be right.

Vasht deployed. Four thousand on the eastern approach, where the terrain channelled any advance through a series of industrial blocks that would give lasgun fire reasonable engagement ranges. Five thousand on the west, spread across a defensive line that used the commercial district’s hab-blocks as hardpoints. Six thousand and both Basilisks on the wide northern boulevard - the obvious approach, the one the Orks would hit first, the one that needed to hold longest.

She looked at the map. She looked at the numbers. The numbers said she lost. The variable was not whether she lost but when, and how many civilians reached the southern highlands before she did.

She began the evacuation order, and in the streets below her command post the machinery of an agri-world’s modest infrastructure began to do what it could, which was not enough, but was what there was.

Eleven kilometres above the monastery, in the upper reaches of an atmosphere that tasted - to the instruments doing the tasting - of nitrogen, oxygen, carbon dioxide, water vapour, and the faintest, most diffuse hint of spore-contamination from the approaching Ork horde, something was thinking.

The Culture drone Still Thinking About It was not, by the standards of the civilisation that had built it, a weapon. It was classified as a Type-4 Strategic Intervention Platform - a designation that, in the Culture’s taxonomy, placed it in the broad and deliberately ambiguous category of assets deployed to situations where a full warship would be inappropriate and a standard drone would be insufficient, which described roughly eighty per cent of the situations the Culture encountered in this galaxy and which had led, over the course of the deployment, to the quiet manufacture of a great many Type-4 platforms and the quiet reassignment of a great many Culture Minds’ cycles to the business of deciding where to send them.

It was large for a drone - two metres along its longest axis, a flattened lozenge of layered field-structures and sensor arrays and processing architecture that massed, when it chose to mass anything at all, somewhere in the region of two tonnes, though mass was a negotiable property for an object whose structural integrity was maintained by fields rather than matter and whose relationship with gravity was best described as elective. Its outer hull - inasmuch as a thing made primarily of shaped energy could be said to have a hull - was a nested series of electromagnetic and gravitational field-Loss that could, depending on configuration, render it invisible to most sensor modalities this galaxy had developed, and make it immune to kinetic impacts up to and including small-arms fire from most of the local civilisations’ weapons systems, and, in extremis, generate a short-duration containment field capable of surviving a direct hit from something considerably more serious, though the drone preferred not to test this capability in conditions where the phrase “direct hit” was not merely theoretical.

The drone could do a great deal. It could not do everything. The distance between those two facts was where its entire operational ethics lived.

It had been dispatched by the GSV An Examination Of The Heart, which had been tracking the WAAAGH!’s trajectory for weeks via its deployed picket, the ROU Conditions Apportioned, a vessel whose name reflected the particular Culture habit of expressing complex philosophical positions through ship nomenclature and whose current philosophical position could be summarised as: there are a lot of Orks in this galaxy and most of them are heading somewhere inconvenient.

Still Thinking About It had chosen its own name, as Culture drones did. The name was, depending on your interpretive framework, either a statement about the ethical complexities of intervention in a galaxy whose political structures made intervention both necessary and destabilising, or an admission that the drone genuinely was still thinking about it - about all of it, about the calculus of helping without asking, about the mathematics of lives saved against the sovereignty violated in the saving, about the question (which the Culture had been arguing about since before this galaxy had developed multicellular life) of whether a sufficiently advanced civilisation had the right to intervene in a less advanced civilisation’s affairs, and if so, under what conditions, and who decided, and was “they’re about to be eaten by Orks” a sufficient condition, and the answer was obviously yes, and the drone knew it was obviously yes, and the drone was still thinking about it, because thinking about it was what made the difference between intervention and imperialism, and the drone was, whatever else it was, not an imperialist.

Its operational parameters were clear. Minimise loss of sapient life. All sapient life.

Including the Orks, if possible.

The drone had reviewed the WAAAGH!’s behavioural profile. It had privately downgraded “if possible” to “if conceivable” to “let’s see.”

It turned its attention to the five transhuman soldiers in ceramite armour who were moving through the monastery with the focused urgency of organisms on a clock.

Its assessment was clinical. It had encountered biological combat platforms before, in other galaxies, in other contexts - engineered soldiers, boosted warriors, gene-crafted killing systems of varying sophistication and varying moral justification. These were among the better ones. Fast. Coordinated. Operating with a decision-cycle speed that approached what the Culture would consider baseline for a combat drone, which was notable for biological organisms the way a particularly fast land animal might be notable to something that built aircraft. The drone noted the genetic modification - nineteen additional organs, each one a small marvel of applied biology, each one serving a function that Culture medical technology could have replicated in an afternoon and improved upon by Thursday. It noted the implanted redundancies, the secondary heart, the fused ribcage, the neurochemical conditioning that allowed them to function under stress loads that would collapse an unmodified human’s cognitive architecture like wet paper.

It noted, with the analytical detachment of an intelligence that belonged to a civilisation which built things like this on an industrial scale and chose to stop, that the engineering was impressive and the purpose was tragic.

These were among the most sophisticated biological weapons platforms in this galaxy. Deployed in five-unit teams. On missions that a single Culture Ship could accomplish in minutes. Without casualties on any side.

The phrase that would appear in the ROU’s report later - they are being wasted - was not admiration. It was a clinical observation about resource allocation in a civilisation that did not know it had alternatives.

The drone checked its tactical picture. Sixteen hours until the vanguard reached the city perimeter. The magos needed forty to ninety minutes. The PDF would hold or would not hold. The civilians would evacuate or would not evacuate. The drone could not do everything and could not do nothing, so it would do what it could, within the parameters it had, for as long as those parameters held.

It began to work.

The Orks hit at dawn.

Eighty thousand through the agri-plains, the leading edge a ragged line of truks and warbuggies and a column of Boyz on foot so deep and so wide that the forward observation posts could not see where it ended and reported, with the strained calm of people who knew they were about to die and had been trained to transmit clearly while doing so, that the enemy was “in significant force, possibly all of them, the Emperor protects, over.”

The forward observation chain lasted eleven minutes. The outer pickets died transmitting.

The garrison fell back to the city perimeter. The fighting was ugly, professional, and conducted by soldiers who understood they were buying time with their lives and were trying to negotiate the best rate. Vasht’s voice was a constant on the command net - calm, specific, economical, the voice of someone who had decided what she could save and was devoting the full weight of her attention to saving it. She moved units like a surgeon moving instruments: not with passion, with precision.

The Basilisks fired. The gun crews performed with the mechanical devotion of people who had practised this so many times that the drill had calcified into something indistinguishable from faith, each round loaded and aimed and fired with a rhythm that was almost liturgical. The crew chief, a woman named Pell with a face like a closed fist and hands that moved with the authority of someone who had been loading shells since she was old enough to lift them, got twenty-three shots out of a mechanism rated for twenty before seizure and considered it a personal victory. The twenty-fourth shell was in the breech when the barrel split. Pell looked at it, spat, and walked to the secondary gun, which had lost its chief gunner to a rokkit two minutes earlier and was being operated by a loader who was doing his best and whose best was not quite enough until Pell arrived, at which point it became sufficient.

The northern approach held because six thousand soldiers with lasguns could put out enough aggregate fire to slow even Orks, provided they did not think about the mathematics. They did not think about the mathematics. They thought about the sight picture and the reload and the next Ork, which was always there, which was always coming, which was the particular nightmare of fighting a species that did not stop when you shot it and often did not stop when you killed it and occasionally did not stop when it was, by any reasonable biological standard, already dead.

On the western approach, Third Platoon of the Ketharan 9th was having an unreasonably good day.

Third Platoon was commanded by Lieutenant Harsk, whose tactical instincts were, in the generous assessment of his own sergeant, “consistently adequate in conditions where adequacy was insufficient.” The platoon had been assigned the western approach’s secondary junction - the position you gave to the unit you trusted least with anything important, the position that said, in the unspoken language of command decisions: we do not expect this to hold, but we need bodies here and you are the bodies we can most afford to lose. Their job was to slow any Orks that broke through the primary line, buy time for the civilians still moving through the transit corridors behind them, and - this was the part nobody said - die usefully.

Third Platoon was not dying.

This was confusing.

The first Ork mob - thirty Boyz and a Nob in full charge, the Nob’s choppa a slab of metal that had probably been a vehicle panel in a previous life and was now a weapon in the way that anything was a weapon when an Ork held it, which was to say entirely and without reservation - hit the barricade and immediately encountered a series of misfortunes so improbable that Corporal Denn, who maintained a small and illicit betting ledger in which he tracked probabilities with a precision that his formal education had never come close to equipping him for, would later describe the engagement as “statistically void.”

The Nob tripped.

On a piece of rebar. That Denn was almost certain had not been there thirty seconds ago.

The mob piled into the fallen Nob in a collision that a tactical instructor would have called a “self-inflicted disruption event” and that Denn called “the funniest thing I’ve ever seen, Sarge, and I’ve seen Harsk try to read a map.” Thirty Orks, each of them massing close to two hundred kilograms, all of them running at full speed, colliding with a stationary obstacle made of their own leader in a cascade of green flesh and crude armour and the particular howling outrage of creatures who had been promised a good fight and had instead received a pratfall. Third Platoon fired into the pile. Things stopped moving. Things behind them tripped on the things that had stopped moving. Harsk ordered concentrated fire on the junction mouth, which was the correct order at the correct time - the correct order, the correct time, which happened to Harsk with a frequency that did not correspond to his established track record but which nobody was inclined to question while Orks were dying instead of them.

Third Platoon executed it with a competence that surprised everyone including Third Platoon.

The second mob flanked through a residential block and emerged into a courtyard that had, in the last several minutes, catastrophically flooded from a water main failure. Forty centimetres of water, cold enough to make even an Ork pause - and they paused, which was the thing, they paused the way all ground-based organisms paused when they stepped into unexpected cold water, a three-second interruption of momentum that was hardwired into something deeper than training or aggression or the WAAAGH!, and three seconds was exactly enough time for Denn’s fire-team to reposition to the overlooking windows and open fire on stationary targets standing in shin-deep water, which was, from a marksmanship perspective, the kind of opportunity that training ranges aspired to and combat almost never delivered.

Third Platoon killed eleven Orks in those three seconds. The water turned dark. The survivors charged, and Third Platoon fell back through the building to a secondary position that was, through a sequence of structural coincidences that Denn was beginning to find actively suspicious, ideally suited to receive a force approaching from exactly the direction the Orks were approaching from.

“Sarge,” Denn said during the lull, crouched behind a section of collapsed wall that formed a firing position of such geometric perfection that it might have been designed for the purpose, “I’m not complaining, but has it occurred to you that we should be dead?”

Sergeant Velk, who had spent eighteen years developing a finely calibrated sense for when the universe was being more cooperative than warranted, said: “Shut up, Denn.”

“It’s just - the rebar. The water main. The Nob tripping on nothing. That wall that collapsed in exactly the right-”

“Denn.”

“I’m just saying, Sarge. The Emperor’s hand is on us today.”

“The Emperor’s hand,” Velk said, checking his power cell with the practised calm of a man who had decided that questioning miracles was less urgent than being prepared when the miracles stopped, “does not typically express itself through plumbing failures. Shut up and reload.”

Eleven kilometres above, Still Thinking About It noted that Third Platoon’s sergeant was significantly more analytically dangerous than Third Platoon’s lieutenant, and adjusted its intervention profile: less theatrical, more consistent with natural infrastructure decay and the kind of tactical good fortune that a rational mind could attribute to terrain and training rather than divine assistance. The drone also noted, with something its architecture was not designed to feel but that a human observer would have called fondness, that Corporal Denn’s betting ledger - which the drone had read via passive sensor scan during the slower moments of the engagement - showed a surprisingly sophisticated grasp of probability for a human on a planet this far from anything with functioning educational infrastructure.

The drone filed a micro-note in its operational log: Corporal Denn, Ketharan 9th, Third Platoon. Probability-literate. It considered adding a qualifier, decided against it, and moved on to the next intervention: a load-bearing wall on the western approach’s tertiary junction that could, with a precisely calculated effector nudge, be persuaded to collapse across the street in a pattern that would inconvenience approximately forty Orks and convenience approximately nobody else, which was, from the drone’s perspective, an acceptable ratio.

The Kastelan robot had been on Kethara’s Reach longer than the city it was defending.

Yorth-IX-Omega. Manufactured on a forge-world that no longer existed, during a millennium that most historians filed under “regrettable” and that the Mechanicus itself classified with a code that translated, roughly, as “we do not discuss this period and you will not ask.” It had served in four campaigns, two compliance actions, and one catastrophe that the Mechanicus records referred to as a “sanctified field test” and that the soldiers who had survived it referred to with vocabulary considerably less sanctified. Damaged, repaired. Damaged again, repaired with less original material and more improvisation, the mechanical equivalent of a garment that has been patched so many times that the patches constitute the garment. Damaged a third time, retired to garrison duty on an agri-world so far from strategic significance that retirement was indistinguishable from being forgotten.

Its datasmith had died eleven years ago. Heart failure, alone in quarters, discovered by a servitor three days later. Without a datasmith, the Kastelan defaulted to its last loaded protocol - Aegis, defensive, zone-denial - loaded for a training exercise the datasmith had never returned from. Nobody on Kethara’s Reach had the MIU interface to load a new one. Nobody was entirely sure what the robot could do. Several people had suggested decommissioning it. Several others had suggested that decommissioning a piece of sacred Mechanicus technology without authorisation was heresy, and nobody had wanted to file the paperwork to determine whose heresy it would be, and so the matter had been quietly allowed to not be resolved, which was the Imperium’s most reliable administrative process.

The Kastelan stood in its maintenance alcove off Service Tunnel Sixteen-Gamma - a corridor that connected the northern market district’s sub-levels to the cargo transit network beneath - and it responded to threats that entered its perimeter, and it had been doing this for eleven years, and it was, in the quiet way of machines that have outlived their operators, still at its post.

The gretchin found Service Tunnel Sixteen-Gamma at hour three.

The tunnel entrance was a natural pathway for the smaller Ork organisms - too narrow for vehicles, too low for full-sized Boyz to move comfortably, but perfect for gretchin, who poured into the sub-level corridors the way water found cracks in a foundation. Three hundred of them, perhaps more - a chittering, scrambling, biting mass of creatures that were individually negligible and collectively capable of overwhelming a position through sheer volume and the willingness, which was not courage because courage implied a choice, to climb over their own dead without hesitation or apparent distress. They were heading for the transit network beneath the civilian evacuation routes. If they reached it, they would emerge behind the PDF’s lines, in the corridors packed with fleeing civilians - women, children, the elderly, the sick, the slow, the unlucky - and nobody in the PDF command structure knew the tunnel existed. Nobody had thought to defend it.

Yorth-IX-Omega activated.

The sound - the PDF soldiers in the building two floors above would later settle on “like a cathedral waking up,” which was imprecise but not wrong - echoed through the tunnel as the Kastelan’s reactor cycled from dormant to combat output in four seconds. The cold-start was rated at seven. Eleven years of idle readiness had shaved three seconds off: the mechanical equivalent of a soldier who polishes his weapon every morning in a war that ended a decade ago, not because anyone orders it but because the polishing is who he is.

The tunnel was two and a half metres wide. The Kastelan was two metres across at the shoulders. The geometry was simple.

Nothing was getting past.

The incendine combustors lit the tunnel’s mouth with a fire that filled the corridor wall to wall, a bloom of heat so intense that the moisture in the tunnel’s air flashed to steam and the stone walls glowed briefly with a dull red light. The gretchin in the first wave did not so much die as cease to be a problem, the combustors converting the leading edge of the swarm into heat and noise and a smell that would permeate the tunnel for weeks afterward. The second wave scrambled over the remains of the first. The third climbed the walls, finding handholds in the cable runs and pipe housings, trying to get above the fire. The Kastelan adjusted its combustor angle - a response within the Aegis protocol’s parameters, the machine-spirit solving the three-dimensional problem of creatures that could climb with the methodical patience of a system that had been thinking about defensive scenarios for eleven years with nothing else to do.

Still Thinking About It found the Kastelan on a passive sensor sweep and reclassified it.

The drone had logged it during its initial survey as a static asset, low-tier, functionally decorative - one of the many pieces of ancient and semi-functional military hardware that the Imperium left standing on garrison worlds, less because they served a purpose than because nobody could be bothered to move them. The classification was wrong.

The machine was operating within rigid protocol constraints and yet making choices within those constraints that the drone’s models had not predicted from its hardware profile. It was positioning itself to keep the tunnel’s narrowest point behind it, ensuring the gretchin could not exploit a wider section further up the corridor. It was cycling its combustor output to manage fuel consumption - short bursts rather than sustained fire, each burst precisely calibrated to the density of the oncoming mass, conserving propellant for the next wave rather than expending it all on this one. It was, within the vocabulary of its eleven-year-old defensive protocol, improvising.

The drone considered this. The Kastelan was not intelligent, not in any way the Culture measured intelligence. Its machine-spirit was a rule-set, a decision tree, a collection of conditional responses to anticipated stimuli. But the Aegis protocol had been loaded for a training exercise in an open field, and the Kastelan was fighting in a tunnel against a threat type the protocol had not been designed to address, and it was winning, and the winning was not luck or brute force but the application of existing rules to new conditions in ways that the rules’ authors had not anticipated.

You are solving a problem you were not given the tools to solve, the drone thought, and you are solving it well, and you do not know that you are doing anything remarkable, because you are a machine following a protocol, and the protocol does not include a subroutine for recognising your own competence.

The combustors exhausted their fuel reserves at minute forty-one.

The Kastelan continued with its fists.

In the tunnel’s confines, this was effective beyond what the word “effective” typically carried. Each piston-driven swing cleared the corridor’s width. The gretchin could only approach from the front, two or three abreast, and each approach lasted approximately as long as it took the Kastelan’s arm to complete a cycle - one sweep, one compression of air, one wet sound of impact, one brief pause during which the surviving gretchin at the front of the swarm considered, to the extent that gretchin considered anything, whether this was a good idea, and were answered by the pressure of three hundred bodies behind them which did not care whether it was a good idea because they could not see what was happening at the front and would not have changed their behaviour if they could.

Bodies accumulated. The gretchin climbed over them. The floor became a ramp of their own dead that brought each successive wave closer to the Kastelan’s head and shoulders, which was a problem the Aegis protocol handled by having the machine step back - one step, resetting the geometry, letting the ramp collapse under its own weight, and resuming. The cycle repeated. Step, fight, accumulate, step back. The tunnel behind the Kastelan remained clear. The transit corridors beyond remained safe. The civilians above continued to move through them, unaware that forty metres beneath their feet, a machine that nobody remembered was dying for them, one step at a time.

At minute fifty-three, the gretchin found a parallel maintenance duct - a cable run just wide enough for their bodies - that bypassed the Kastelan’s position and opened into the tunnel behind it. A dozen came through before the Kastelan registered the new vector. The machine could not turn - the tunnel was too narrow for its chassis to rotate without losing the chokepoint - and so it did something the drone had not expected.

It stepped backward into the cable run’s opening, blocking it with its hull, and continued to fight the frontal assault one-armed, the other arm pinned against the duct to seal it.

The drone logged this. It did not annotate the log. The action spoke for itself.

At minute sixty-eight, the Kastelan’s left shoulder actuator failed. A gretchin with a crude explosive - a stick-bomb, a pipe packed with unstable compounds and optimism - had detonated it against the joint housing from a distance of approximately zero, which was brave in the way that gretchin were sometimes brave, which was the bravery of creatures that did not fully understand death and therefore did not fully understand what they were risking. The actuator fused. The arm locked in position across the cable duct, which meant the duct remained sealed, which meant the gretchin were still funnelled to the front, which meant the Kastelan could still hold.

It held with one arm. The tunnel floor was no longer visible beneath the dead.

At minute seventy-nine, the reactor output began to fluctuate. Thermal stress, cumulative damage, eleven years of deferred maintenance catching up all at once in the way that deferred maintenance always catches up: not gradually, not with warning, but all at once, in the middle of the one moment when you cannot afford it. The Kastelan’s movements slowed. The interval between swings widened. The gretchin, sensing the change with the pack-animal instinct of creatures that had spent their evolutionary history being prey and had learned, in the deep grammar of their nervous systems, to recognise when a predator was weakening, pressed harder.

At minute eighty-four, Yorth-IX-Omega stepped forward.

The Aegis protocol did not include advance.

The protocol defined a perimeter. The perimeter was the tunnel section. The protocol was eleven years old and loaded for a training exercise and it was the only set of instructions the machine had, and the machine stepped forward, three metres into the gretchin mass, compressing the swarm back toward the tunnel mouth, buying space. Its remaining arm swung in arcs that were no longer tactically optimal but were comprehensive.

The reactor output dropped below combat threshold at minute eighty-eight.

Its locomotive systems failed at minute ninety.

It fell to one knee - slowly, with the particular gravity of very heavy things that do not want to stop being upright - and continued fighting from the ground, its one functioning arm sweeping a diminishing arc, each swing slower than the last, each swing clearing a space that the gretchin filled a little faster than the last time, the ratio of capability to threat crossing a line that the drone, watching from above through three metres of stone and reinforced concrete, could calculate to the second.

At minute ninety-one, the Kastelan stopped.

Its ocular sensors - two amber points that had been lit continuously for eleven years, through the datasmith’s death and the long silence after and the forgotten training exercise and the slow accretion of dust and the day the city shook and the day the things came down the tunnel - faded to black in a sequence that took approximately four seconds, and that looked, from the drone’s sensors, like something closing its eyes.

The surviving gretchin - fewer than eighty, from an initial force of over three hundred - milled in the tunnel for several minutes, then retreated. Not because they understood that the machine was dead, but because the tunnel was so thoroughly blocked with the Kastelan’s chassis and their own dead that forward movement was no longer physically possible. They would find another route. By the time they did, the civilians above had moved through the transit corridors and out.

Ninety-one minutes. One machine. No datasmith. An eleven-year-old protocol.

A tunnel held.

At the three-hour mark, with the PDF’s northern line still holding through a combination of mass fire, Vasht’s precise redeployments, and the kind of institutional stubbornness that characterised soldiers who had been told they were the wall between their civilians and the things that wanted to eat them, the WAAAGH! field manifested.

The Ork warband’s weirdboy - a creature that existed in a state of permanent neurological crisis, its brain a conductor for the collective psychic energy generated by eighty thousand Orks in the throes of combat ecstasy - channelled the WAAAGH! field in a surge that lit the electromagnetic spectrum from one end to the other and hit Still Thinking About It’s systems like a wave hitting a cliff.

Not jamming. Nothing so structured. Turbulence, as if the local physics had briefly decided to renegotiate its terms.

For eleven seconds, the drone’s effector fields stuttered. A building on the northern approach - a six-storey hab-block whose load-bearing wall the drone had been reinforcing with a precisely calibrated energy field, compensating for the structural damage the Ork artillery had inflicted - sagged three centimetres and cracked along its eastern face. Third Platoon’s bubble of implausible fortune developed a gap. A water main the drone had been preparing to rupture in the path of an Ork flanking force stayed intact. An ammunition cache it had been subtly warming to improve the reliability of a PDF squad’s cold-affected power cells lost its heat differential and the cells reverted to their baseline thirty-per-cent misfire rate.

The drone recovered in under a second. The effector fields stabilised. The building was re-supported. Third Platoon’s luck resumed.

But the gap had cost. A PDF company on the northern perimeter, outside the degraded coverage zone during those eleven seconds, had taken a direct rokkit battery hit.

Forty-three soldiers. Dead.

The drone logged the incident. It flagged the WAAAGH! field interaction for analysis with a priority marker it did not typically assign to single-incident anomalies. The marker was reserved for phenomena that altered the drone’s operational assumptions about the physics of the universe it was operating in, and the Ork psychic field’s ability to degrade Culture effector systems - even for eleven seconds, even partially, even once - qualified.

The drone thought about the forty-three. It had been six hundred metres from providing coverage. Six hundred metres and eleven seconds. The rokkit battery’s trajectory had been within its effector range before the disruption and was again after, and during those eleven seconds the battery had fired and the rounds had landed and forty-three people had been alive and then had not been alive, and the drone could calculate - could not help calculating, because calculation was how it interfaced with grief - the exact field configuration that would have deflected the rokkits, the exact energy expenditure required, the exact probability of success: 0.97. As close to certainty as the universe permitted. Not available during those eleven seconds.

Forty-three. The number went into the log beside the others.

In the monastery, Sergeant Kael had reached a decision.

The magos needed thirty more minutes. The eastern approach was buckling - the PDF regiment assigned to hold it had been fighting for four hours and their casualties had crossed the threshold where effective unit cohesion began to degrade, not because the soldiers had stopped fighting but because there were not enough of them left for their fire to be mutually supporting. The Orks were through the outer industrial blocks and into the commercial district, and the monastery was in the commercial district, and the mathematics were not subtle.

Kael split the team. Torek and Maren would stay with the magos, providing close protection during the final data-compression phase. Kael, Ghael, and Cassar would deploy to the eastern approach.

Not to save the city. Not to reinforce the PDF. Not to hold the line or turn the tide or perform any of the heroic functions that the Imperium’s recruitment propaganda attributed to the Emperor’s finest warriors when it depicted them in full colour on hive-city walls. They would deploy to the eastern approach because the eastern approach was between the Orks and the magos, and the magos needed thirty more minutes, and three Deathwatch Space Marines could hold an approach for thirty minutes against Orks, and the PDF soldiers dying on the approach were, from a mission-planning perspective, a factor in the equation but not the equation itself.

The equation was: hold thirty minutes. Cost: acceptable.

The three Space Marines hit the eastern approach, and the eastern approach changed.

It changed the way a room changes when something large and predatory enters it - not gradually, not through any single action, but all at once, the entire dynamic of the space rearranging itself around a new centre of gravity. One moment the eastern approach was a place where two hundred PDF soldiers were dying in good order, trading lasgun fire for time, falling back through the commercial district’s narrow streets in a pattern that Vasht had designed to be survivable and that the Orks’ sheer mass was slowly, methodically proving was not. The next moment the eastern approach was a place where three organisms that massed a combined twelve hundred kilograms and carried enough firepower to level a city block were moving through the Ork advance with the unhurried purposefulness of heavy machinery in a space designed for people.

Kael’s first burst killed two Orks at a range of ninety metres. The second burst, fired while the sound of the first was still propagating through the street’s acoustics, killed a Nob. The third killed whatever had been standing behind the Nob. The bolt rifle operated with a rhythm that had nothing to do with hurry and everything to do with a man who had been aiming at things for forty years and for whom the relationship between eye and trigger and the death of the thing being aimed at had become less a skill than a physical law - a feature of the landscape he moved through, as fixed and as reliable as the angle of the streets or the pull of the planet’s gravity. The aim did not adjust. The aim was already where it needed to be. The targets moved into it the way water moved into a depression: naturally, inevitably, because the geometry permitted no alternative.

This was what a PDF soldier on the eastern approach saw, if he was positioned to see anything at all through the dust and the noise and the particular chaos of close-quarters urban combat against an enemy that did not stop when shot and often did not stop when killed: he saw a ceramite shape in the smoke, impossibly large, moving at a pace that should have been a walk and was not, and the smoke closed behind it and things died in front of it and the dying had a sound - the deep, percussive crack of mass-reactive detonation inside a torso, a sound the soldier’s training had not prepared him for because his training had been conducted with lasguns, which killed cleanly, and bolt rounds did not kill cleanly; they killed comprehensively, each round a small, contained catastrophe that detonated inside its target with a specificity that was almost surgical if surgery involved removing the patient’s entire central mass and distributing it across the nearest wall.

Ghael was harder to see.

The Raven Guard did not move through the combat the way the other two moved through it - he moved through it the way a blade moved through a body, which was to say he was not visible at the point of entry and not visible at the point of exit and the only evidence of his passage was the damage. He had dropped from the roofline of a commercial hab-block in the first seconds of engagement, landing behind the Ork advance’s leading edge with a silence that was, for a three-hundred-kilogram organism in powered ceramite armour, physically implausible and yet documented, because Raven Guard training included techniques for redistributing impact energy through the armour’s joint architecture that the other Chapters regarded as somewhere between unnecessary and witchcraft. He killed with a combat knife. The knife was a half-metre of mono-edged ceramite, which was a polite way of describing a weapon that could open a tank’s hull plating under the right conditions and that Ghael used on throats because throats were faster, and speed was a kindness in the narrow technical sense that a fast death was preferable to a slow one, though Ghael did not think of it as kindness; he thought of it as economy, and economy was the Raven Guard’s entire tactical philosophy compressed into a blade’s edge.

The PDF soldiers did not see Ghael. They saw Orks dying. The Orks in the middle of the formation - the ones not yet engaged with Kael’s bolter fire at the front - began dying in ways that the Orks around them could not immediately explain, which produced a phenomenon the Deathwatch’s tactical literature called “confusion kill-loss” and that the Orks experienced as: something is wrong, something is here, something is killing us and we cannot find it, and for a species that processed most of its emotional range through the medium of violence, the inability to locate the source of violence being done to them was not fear, exactly - Orks did not experience fear in a way that a human psychologist would recognise - but it was a disruption of the fundamental Orkish expectation that fighting involved a fightable thing, and the disruption slowed them by two or three seconds per encounter, and two or three seconds per encounter across thirty-one minutes of continuous engagement was the difference between a line that held and a line that didn’t.

Cassar held the junction.

The junction was where three streets met in a triangle of open ground - twenty metres on a side, flanked by the shells of commercial buildings that the Ork artillery had partially demolished and that the fighting had finished demolishing, the rubble forming a rough amphitheatre of broken masonry and twisted reinforcement bar around a patch of flagstone that was, for a single Space Marine with a chainsword and a faith that did not distinguish between prayer and violence, the closest thing to sacred ground that a battlefield could offer.

The Orks came through the junction in waves - not organised waves, not the disciplined surges of a military force executing a plan, but the organic, tidal waves of a mass of creatures that were all trying to go in the same direction and could not all fit, the rear ranks pressing the front ranks forward with the indifferent momentum of something that did not care about the front ranks’ objections because it could not hear them over its own noise. Cassar met each wave the same way. The chainsword described an arc. The arc was not efficient. The arc was not economical. The arc was comprehensive - a hemisphere of monomolecular-toothed chain spinning at a velocity that turned the air in its path into a brief, visible distortion, a heat-shimmer of displaced atmosphere, and anything that entered the hemisphere left it in a configuration that was no longer compatible with being alive.

The Black Templar fought the way a fire burned: without hesitation, without economy, without the calculation that characterised Kael’s targeting or the precision that characterised Ghael’s bladework. There was no wasted motion because there was no calculation of what constituted waste - every swing was total, every engagement absolute, the chainsword moving from one target to the next without the fractional pause that a tactician would have used to assess and that a Templar did not use because assessment implied doubt and doubt implied the possibility that the Emperor’s work might not require doing, and this possibility did not exist in Cassar’s operational theology. He was not killing Orks. He was performing a sacrament, and the sacrament demanded that every stroke carry the full weight of his conviction, and his conviction weighed as much as he did, which was three hundred and forty kilograms in full war-plate, and the Orks could feel it - not the weight, not the skill, but the intent, the absolute, frictionless certainty of a being that had never once questioned whether what it was doing was right, and the Orks responded to this the way Orks responded to everything they recognised as genuine: they came for him. Eagerly. Joyfully. In numbers that would have overwhelmed a lesser fighter in minutes and that fed Cassar the way fuel fed his chainsword, each new body another confirmation that the Emperor’s enemies were infinite and that the Emperor’s servant was equal to infinity, at least for tonight, at least in this junction, at least until the mathematics - which Cassar did not calculate and would not have cared about if he had - turned against him.

The mathematics turned against him at minute twenty-nine.

The Nob came through the junction’s eastern mouth at a dead sprint - four hundred kilograms of muscle and fury and crude cybernetic augmentation, a power-klaw on its right arm that was essentially a piston-driven industrial vice repurposed for the removal of things the Nob wanted removed, which was everything, always, because Ork Nobs did not distinguish between obstacles and enemies and the klaw handled both. Cassar saw it. Cassar’s chainsword was already in motion - the backswing of a stroke that had just opened a Boy from collarbone to pelvis, the blade heavy with momentum, the arc carrying it away from the Nob’s approach vector by the width of a body and the duration of a heartbeat.

A heartbeat was too long.

The klaw took Cassar in the lower torso. The sound was ceramite failing - a sound like a cathedral’s stone cracking under a load it was never meant to bear, a deep, structural, final sound that the PDF soldiers three streets away heard over the noise of their own fighting and did not identify and did not need to identify because the sound was, in itself, an event, the kind of sound that happened when something very strong hit something very tough and the strong thing won. The klaw’s piston drove inward. Cassar’s armour held for a fraction of a second - the fraction of a second that separated “damaged” from “destroyed” - and then it did not hold, and the klaw was inside, and Cassar’s lower body ceased to be a functioning system and became, instead, a problem that his enhanced physiology would attempt to solve through every mechanism the Emperor’s science had given it, beginning with the sus-an membrane, which activated with the chemical urgency of a system that recognised it was the last line of defence and that the line was already behind it.

Cassar fell. The chainsword stayed in his hand. His grip on it had not loosened. The fingers that had held it during descent - steady when gravity was not, certain when nothing else was - held it still, and would hold it still on the deck of the Thunderhawk, palms up, the blade silent, as though waiting for one more swing that would not come, or that had not yet come, the distinction being - for a man whose faith did not recognise the concept of a final stroke - meaningless.

Ghael killed the Nob. The killing took less than a second and was not something the Nob was aware of at any point during the process.

Kael held the eastern approach for two more minutes. The bolt rifle spoke. The things it spoke to stopped moving. The magos’s data was secure. The Thunderhawk was spooling up. The mission was complete.

The mission was the magos. It was always the magos. And everything else - the junction, the Ork dead, the PDF soldiers who had watched three giants walk into their war and make it briefly survivable, and Brother Cassar, who had held sacred ground with the absolute conviction of a man who had never once asked whether the ground deserved it - was terrain.

Still Thinking About It watched from above and did not intervene. The Marines were combatants engaged with combatants. The drone’s parameters did not extend to managing violence between willing participants, and these were willing - the Space Marines willing to kill, the Orks willing to fight, the arrangement so mutually understood that it functioned almost as a contract between organisms that had both been built for this and were, in the narrow and terrible way of things that exist to destroy each other, well-suited.

So the drone watched the Space Marines hold the line. And quietly, invisibly, saved everyone else.

A lasgun power cell that was about to fail at a critical moment received a precisely calibrated thermal pulse and didn’t. A section of wall that was about to collapse onto a PDF fire-team shifted two degrees on its foundation and fell into the street instead. An Ork rokkit aimed at the PDF’s remaining ammunition dump developed a guidance fault - a tiny, undetectable effector nudge to the crude steering fin - and buried itself in an empty building three blocks west. A medic trying to reach a wounded soldier found that the rubble blocking her path had been rearranged, just enough to admit a human body sideways, and she squeezed through and reached the soldier and applied the tourniquet and dragged him back, and neither of them wondered how the rubble had moved because in a warzone things moved all the time and the fact that they occasionally moved in useful directions was, if you were the kind of person who thought about such things, the Emperor’s grace, and if you were not, it was luck, and either way you took it and were grateful and did not examine the mechanism.

Four hundred and twelve interventions. The drone would count them later.

Thirty-one minutes after the kill-team split, the magos declared her data secured.

The Thunderhawk’s engines spooled up in the monastery courtyard, blowing dust and debris in horizontal sheets that scoured the flagstones the drop pod had cracked five hours earlier. Magos Lyren-3 Cathek walked up the assault ramp with the measured, unhurried pace of a Mechanicus adept who considered urgency a biological weakness, carrying a data-casket in her mechadendrites that contained, presumably, whatever had justified dropping five of the Imperium’s most expensive soldiers onto a world the Imperium had already written off.

Kael’s kill-team assembled. Four walked aboard. Brother Cassar was carried.

Brother Maren had taken a wound to his augmetic shoulder that he had not reported and would not report until the Thunderhawk reached orbit, at which point the Iron Hand’s pain-suppression systems would disengage and the severity of the injury would become apparent to everyone including Maren, who would regard it with the detachment of a man whose Chapter considered flesh a weakness and mechanical failure merely an engineering problem.

The Thunderhawk lifted. The monastery’s courtyard shrank beneath it. The city shrank. The PDF’s defensive lines - still holding, still fighting, still buying time for civilians with the stubborn, bloody-minded endurance of soldiers who had been told the city was lost and had decided that lost and abandoned were different words - became a pattern of muzzle-flashes and dust-plumes and the small, hot flickers of things burning.

One dead. One critical. The kill-team filed these as operational cost, which was accurate, and which was also a way of not thinking about Brother Cassar’s hands - the same hands that had gripped his chainsword with such certainty during descent, the same hands that had been steady when gravity was not - lying still and open on the deck of the Thunderhawk, palms up, as if waiting for something to be placed in them.

Still Thinking About It remained for six more hours.

The Thunderhawk was gone. The monastery was empty. The magos and her data-casket and her Deathwatch escort were in orbit, transitioning to warp, leaving Kethara’s Reach to its arithmetic. The drone’s mission parameters had not specified a departure time. They had specified: minimise loss of sapient life. The sapient life below was still in the process of being lost, and the drone was still here, and the parameters still applied.

Six hours of work. Six hours of ruptured water mains and collapsed walls and ammunition that jammed at the right moment for the wrong side and Ork vehicles that developed steering faults in the exact proximity of ravines. Six hours of Vasht’s calm voice on the command net, directing a retreat that was as orderly as a retreat could be when the thing you were retreating from was eighty thousand Orks who had broken through your lines and were treating the city’s residential districts as a combination of playground, larder, and recreational demolition site.

Third Platoon survived. This continued to confuse them. Denn had stopped commenting on it, which Velk considered a minor miracle in its own right, and which was in fact the result of the drone carefully ensuring that Third Platoon’s subsequent good fortune was subtle enough to be attributed to Denn’s own tactical suggestions, a redirection of credit that kept the corporal busy taking satisfaction in his own competence rather than investigating its source.

An Ork speed-mob - forty warbuggies, loud, fast, heading directly for the civilian evacuation column’s southern flank - found itself inexplicably in an empty reservoir basin three kilometres from the evacuation route. The basin was deep, steep-walled, and difficult to exit in a wheeled vehicle. The Orks found this confusing and then exciting, because a reservoir basin was basically a big arena, which was basically perfect, and within minutes they had organised an impromptu race around the basin’s perimeter that was considerably more engaging than the business of chasing fleeing civilians and that occupied them for the better part of an hour, by which point the evacuation column was beyond pursuit range. One of the warbuggies - painted red, was winning by a margin that its driver attributed to superior Orky engineering and that the drone attributed to localised psychic reality-distortion, which was, depending on your epistemological framework, the same thing.

Three hundred and ten thousand civilians made it to the southern highlands. Ninety thousand could not be reached - too far from the evacuation routes, too close to the Ork advance, too embedded in the city’s northern districts where the fighting had been heaviest and the infrastructure had collapsed first. The drone calculated the interventions that would have been required to reach them: two thousand four hundred and sixteen, executed over a twelve-hour period, with a field-energy expenditure that exceeded the drone’s reserves by a factor of three. The math was not viable.

The drone logged the number. Ninety thousand. It did not dwell on it. It moved on, because moving on was what you did when the number was too large to carry and too important to set down, and the space between those two facts was where you lived, if you were the kind of intelligence that lived at all.

The ROU Conditions Apportioned filed its report seventeen hours after the engagement’s conclusion, having waited for the drone’s detailed sensor logs before compiling its analysis. The report was thorough, dispassionate, and written in the particular register that Culture warships adopted when describing events they found both militarily straightforward and ethically intractable - the register of a weapon that would prefer to be a library but that has accepted, with the grace of long practice, that the galaxy has different plans.

The report noted the WAAAGH! field anomaly - the eleven-second effector disruption, the forty-three PDF casualties, the implications for Culture operations in proximity to large Ork formations. It noted the Space Marines’ performance and included a tactical assessment that its author had considered, revised, considered again, and ultimately decided to leave exactly as originally drafted:

They are among the more capable individual combat platforms we have encountered in this galaxy, and they are being spent in a manner this vessel can only describe as conspicuous waste - organisms of this capability deployed in units of five on missions a single offensive drone could resolve in minutes. The most widely deployed, the most standardised, the most spent. The bio-engineering is impressive. The deployment doctrine is a moral and strategic failure of a kind that suggests the civilisation responsible does not understand what it has built, or understands and does not care, and this vessel is not yet certain which interpretation is worse.

The ROU appended a footnote: The warship acknowledges that the three Marines deployed to the eastern approach held that approach for thirty-one minutes against a force ratio of approximately eight hundred to one, sustaining one critical casualty and inflicting losses this vessel estimates at one hundred and forty-seven enemy killed. This performance is noted without recommendation, as this vessel does not make recommendations regarding the internal military doctrines of sovereign civilisations, except to observe that if these organisms were deployed in adequate formations, supported by logistics appropriate to their capability, and directed by command structures that valued their survival, they would constitute the most effective ground-combat force in the galaxy. They are not deployed this way. The waste is the point. The civilisation treats them as currency - valuable, expendable, minted to be spent.

Still Thinking About It filed its own report. It was shorter than the ROU’s, more granular, structured as a sequence of numbered entries that proceeded from the general to the specific with the methodical organisation of an intelligence that had been taught, by temperament and by training, to account for its actions completely.

Four hundred and twelve interventions.

Six thousand four hundred and nine sapient lives preserved through direct or indirect action during the engagement period.

Ninety-three sapient lives not preserved despite being within theoretical intervention range, plus the forty-three from the WAAAGH! field event. Total: one hundred and thirty-six lives that fell inside the drone’s operational sphere and were not saved.

The report listed Brother Cassar. It noted that it could have saved him - six available options, each one technically viable within the drone’s operational parameters, any one of which would have kept the Black Templar on his feet with his organs inside his body where they belonged. A micro-displacement of the Nob’s power-klaw at the moment of impact: sufficient. A brief effector pulse to the klaw’s servo-mechanism, inducing a two-second seizure: sufficient. A structural failure in the rubble beneath the Nob’s feet, disrupting its balance at the critical instant: sufficient. Any of six interventions, each one small, each one invisible, each one well within the drone’s capabilities.

It had not intervened. The Emperor’s hand, it seemed, did not reach everywhere.

The drone understood the protocol. The drone agreed with the protocol.

The drone would have saved him, given the choice again, and the drone knew this about itself, and the drone logged this too, because self-knowledge was also part of what it was, and the distance between what it believed and what it would do was a distance it intended to keep honest about, even in reports that no one would read with particular attention.

The report’s final entry was an equipment manifest update.

The drone had redesignated one of its knife missiles - a type-1 autonomous weapons platform, eighty six grams of directed kinetic persuasion capable of velocities that would render it visible to the human eye only as a brief metallic smear in the visual field, a weapon so fast and so precise that it could, if the situation required, remove a specific component from a functioning mechanism at a range of two kilometres without disturbing the components adjacent to it. Previously it had carried a standard alphanumeric identifier: KM-7714-S3.

The drone had renamed it Yorth.

In the southern highlands, in a shelter made of emergency tarpaulins and the kind of desperate improvisation that civilians perform when the alternative is sleeping in the open, Corporal Denn was updating his betting ledger by the light of a chemical glow-stick.

The odds he was calculating were for a wager on whether Third Platoon’s luck would hold into the next engagement. He had considered the available evidence - and had arrived at seven to one against. This was, he felt, generous. Luck did not repeat. Luck was, by definition, the thing that happened once.

The drone, reading the ledger from eleven kilometres up with the idle thoroughness of an intelligence that processed information the way other beings breathed, noted that Denn’s probability estimate was, given the information available to him, remarkably accurate.

In the shelter beside Denn’s, Sergeant Velk was cleaning his lasgun. He cleaned it the way he always cleaned it - methodically, thoroughly, with the attention of someone who did not believe in miracles but was not prepared to be ungrateful for them. When he finished, he sat for a moment with the weapon across his knees, looking at his hands. The hands that had held the weapon. The hands that had pulled the trigger. The hands that had done the work.

He did not say a prayer. Velk was not the praying kind. But he inclined his head, briefly, toward nothing in particular - a gesture so small that nobody in the shelter saw it, and so old that it did not need to be seen.

Eleven kilometres up, the drone saw it.