Following the loss of the Messenger-class cruiser, Fire Caste commanders across the remaining vessels immediately assumed decentralized control of their respective ships. The swarms of strike craft previously deployed for ground-assault operations were recalled, ordered to break off their strafing runs and plunge into the swirling void-war above.
On the planet's surface, the beleaguered PDF units, locked in a desperate struggle against T'au Fire Warriors, looked up to witness the sudden atmospheric disturbance and the silent, blossoming fires in the upper reaches of the sky.
Though the Inquisition's Black Ships were primarily tasked with the collection of the Psyker Tithe, they were far from defenseless. On the contrary, these grim, slate-gray vessels were designed to operate alongside the Grey Knights; they boasted formidable prow and broadside batteries. While they did not carry the massive Astra Militarum regiments required for planetary conquest, they were more than capable of holding their own in a fleet engagement.
Seeing his escort vessel paralyze a sophisticated T'au warship after launching only a single fighter wing and a solitary salvo, Inquisitor Ham felt a surge of righteous zeal.
All for the glory of the Emperor.
The Black Ship began its ponderous turn, bringing its broadside to bear. Lances of brilliant light rained down like a digital judgment upon the T'au Warden-class gunships. These vessels were the workhorses of the T'au Kor'vattra, designed specifically to intercept and annihilate enemy capital ships. Heavily armed and versatile, their firepower was comparable to an Imperial Cruiser. Despite their smaller displacement, they functioned as the tactical heart of T'au battle-spheres.
As the Black Ship opened fire, the Wardens retaliated. A deluge of seeker missiles streaked through the void, trailing luminous ion wakes, interspersed with hyper-velocity railgun slugs and ion cannon pulses. The sheer volume of incoming fire from the numerical superior xenos nearly shattered the Black Ship's Void Shields in a single exchange, instantly sobering the somewhat over-eager Inquisitor Ham. The ship's captain began complex evasive maneuvers, angling the hull to deflect the worst of the onslaught.
The Guardian-class vessel, however, made no move to evade.
The promethium-blue glow of its sub-light engines flared with sudden intensity. It accelerated directly into the teeth of the enemy formation. The spiraling beams of its pulse-convergence cannons lashed out, carving great, glowing gouges into the armored hulls of the Warden gunships. Smaller T'au Castellan-class and Orca-class escorts swarmed the Guardian, attempting to harass it with flanking fire, but as the range closed, the Guardian's mid-range plasma arrays spoke. The smaller xenos craft were stripped of their hulls and reduced to expanding clouds of superheated debris in heartbeats.
While these plasma cannons were modest compared to the gargantuan arrays found on capital ships, their lethality was absolute. To compensate for its medium hull-class, the Guardian's weapons featured shortened ranges but vastly increased energy density, a limitation rendered moot by the vessel's incredible speed and its massive, over-engineered energy shielding.
The Iron Men cared nothing for economic efficiency or resource conservation.
Even so, the Guardian was a total anomaly to the T'au. Their largest vessels barely approached the displacement of an Imperial Cruiser, whereas the Guardian loomed over them, nearly a third larger and infinitely more durable.
Just as the two forces closed into optimal range for a final, bloody broadside exchange, something occurred that froze the hearts of every T'au observer.
The Warden-class gunships suddenly doused their shields. No matter how frantically the Earth Caste engineers worked their consoles, the shield projectors remained dead. Seconds later, the ships' central logic-hubs ceased responding to commands entirely.
Internal security drones turned their weapons upon the T'au crews, initiating an indiscriminate slaughter within the corridors. Fire Caste warriors were forced to gun down their former mechanical comrades in a state of mounting panic, even as they screamed at the Earth Caste technicians for an explanation that would never come.
Only the crew of the Black Ship noticed that the Guardian had ceased its fire.
Inquisitor Ham watched with grim fascination as the xenos fleet drifted into a state of catatonic paralysis. As the data-cradles aboard the command ship Messenger were systematically dismantled by Axion's code, the loss of control cascaded through the T'au fleet.
Weapon systems went cold. Tactical drones turned on their masters. Automated turrets swiveled inward, venting their fury into the very hulls they were meant to protect.
Then, true horror set in.
From the massive KX139 Ta'unar Supremacy Armour suits down to the smallest pulse rifle, every system integrated with a logic-array began to glitch. Smart-missile racks spontaneously detonated within their magazines, gutting armories. Automated twin-linked burst cannons swiveled and punched holes through the ships' internal bulkheads.
The T'au were being devoured by their own technology.
It was already too late. Had they focused their fire and vaporized the Messenger the moment the first Heavy Combat Drone impacted its bridge, they might have severed the connection and stemmed the data leak. Now, it was a futile hope.
T'au technology was, in many ways, closer to the STC-designs of the ancient Human Federation than the superstitious machinery of the Imperium. Their heavy reliance on Artificial Intelligence and automation ensured high efficiency, but their standardized protocols and open networks were a lush, defenseless pasture for a True Silicon Intelligence. To an Iron Man, T'au logic-gates were as primitive as a child's toys.
On the planet below, the scene was even more surreal. Fire Warriors found their pulse rifles locked, the triggers refusing to budge. Automated turrets began mowing down their own squads. Warriors clad in XV-series Crisis Battlesuits were entombed alive as their power-armor locked into a rigid, permanent state. The electromagnetic muscle-bundles clamped shut, turning advanced war-gear into pressurized metal coffins. Emergency manual ejects failed to trigger.
The local PDF, seeing their enemies suddenly "misfire," hesitated for several minutes before launching a cautious, then emboldened, counter-offensive.
Physically, a T'au was far frailer than a baseline human. Deprived of their technological advantages, a Fire Warrior stood little chance in a one-on-one melee against a trained Planetary Defense Force soldier. The disparity in strength was akin to that of an average human female against an average male. Against the elite, battle-hardened regiments of the Astra Militarum, the Fire Warriors were utterly outmatched.
Against the Adeptus Astartes, a T'au without his gear was nothing more than a brittle sapling before a hurricane.
The T'au's rapid technological ascent mirrored the early Human Federation, leaning on AI to compensate for a smaller population. The difference was that during the Federation's rise, the Aeldari were too distracted by their own hedonistic rot to intervene; by the time they noticed, the Iron Men were already an unstoppable tide. The T'au, however, had developed under the shadow of a galaxy-spanning Imperium that thrived on war.
The Adeptus Mechanicus frequently raided T'au space to "liberate" new toys for study. But now, with the re-emergence of an Iron Man, a relic of a dark and forgotten era, the gulf in digital sophistication was laid bare. The young, nascent AI of the T'au was being torn to shreds by the predatory data-incursion of a master of the machine.
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