The loss of the Bio-Titans served only to further provoke the hunger of the Great Devourer lurking in the warp.
As the earth buckled and groaned, a shadow the size of an Imperial Frigate manifested in the distance. It drifted through the toxic sky, and beneath its silhouette, a host of dinosaurian behemoths thundered across the plains. These were Vermis-class Bio-Titan—"Saints" of the swarm. Unlike the spider-like Heirophants, these Bio-Titans were living battering rams, forty-meter-tall hills of chitin and muscle charging with the momentum of an avalanche.
The ground shuddered violently under their tread.
As these gargantuan organisms drew near, the Deathwatch standing in the rear finally beheld the strange beast suspended in the air. It bore the quintessential marks of the Tyranid Hive Mind: a massive, streamlined chassis encased in hardened chitinous plates, with bioluminescent organs and pulsating capillary towers weaving through the gaps in its armor.
The Dominatrix was the literal avatar of the Hive Mind's will.
As a super-synapse node for the ground swarm, it channeled the direct consciousness of the Great Devourer. It hovered at the periphery of the battlefield, cleverly positioning its massive bulk outside the firing arcs of the heavy defense batteries nestled between the two nearby fortresses. The Great Devourer intended to witness the utter annihilation of these loathsome metallic constructs with its own eyes, driven by a frenzied hunger and an insatiable desire to consume.
In the center of the fray, two more Heirophants had already succumbed to the concentrated fire of the Executor Heavy Tanks. However, the Vermis-class Bio-Titans were a different breed. They were obscenely resilient; while their ranged lethality lacked the specialized punch of the Heirophants, their sheer damage-soaking capacity far exceeded that of the "spiders." Their powerful frames propelled them at speeds that outstripped the heavy treads of the Executors.
The data streams were unequivocal. Axion knew with cold logic that his forces no longer possessed a path to victory.
The vanguard action did not falter. Vermis-class Bio-Titans began to hunt the Executor Heavy Tanks. Massive shells shattered the psychic spores and warp-shields of several Bio-Titans, but the creatures' vitality was staggering. Even when eight Executors coordinated a single-target volley, the Vermises within the resulting cloud of dust and fire merely swayed, refusing to fall.
In a grim test of the enemy's threshold, two Executors were successively crushed into metallic scrap beneath the titans' massive limbs. Though the resulting detonation of their ammunition and power cores flipped the beasts and severed limbs, the Bio-Titans remained terrifyingly combat-effective.
Observing the stalemate, the Dominatrix flared with psychic radiance. A colossal warp-shockwave was unleashed from the sky. Yet, to the remaining Iron Men, the psychic assault was white noise. Their movements remained fluid; their firing cycles and blade-strokes never hesitated. The massive Executors continued the grueling task of kiting the Vermises across the broken earth.
Behind them, however, the Astartes were caught in the periphery of the blast. They froze in place, their consciousnesses nearly shattered by the psychic trauma. Several Black Shield Astartes collapsed, including Kan, whose armor was festooned with purity seals. Kan clutched a hand-carved Aquila; the metal relic now spider-webbed with cracks. Their Gene-seed rendered some of them hyper-sensitive to the warp, making even the aftershocks of such an attack devastating.
Collapsing under the weight of the vertigo, Kan pressed the Aquila to his chest, whispering a prayer of thanks to the Emperor for the strength to continue his duty to the Imperium.
Axion had no time for the Astartes.
Across the ridge, the Eight-Legs began to salvage materiel, packing Automatons and rear-line Peltast Sniper Automata into heavy freight containers. More Eight-Legs drifted toward the Apocalypse-class Titan, which sat immobilized like a crippled crab. Hundreds of the multi-limbed machines braced themselves beneath the Titan, acting as makeshift struts to stabilize the massive God-Machine.
Restored to a level firing plane, the Apocalypse-class Titan finally found its mark. Despite a massive section of its chassis being missing, its redundant power conduits hummed to life. An Iron Man Titan was not so easily unmade.
A titanic beam of light suddenly bisected the battlefield, striking the Dominatrix hovering kilometers away. Yet, the super-node's psychic shielding was impenetrable. A Giant Atom-Pulse Cannon capable of gutting a frigate produced only ripples across its shimmering warp-shroud.
An ultrasonic shriek, inaudible to human ears, erupted from the Dominatrix's organs. The charging Vermises instantly pivoted, swarming the braced Apocalypse Titan. The impact tore the Titan's chassis asunder; the upper structure collapsed in a cacophony of groaning metal. Residual missiles cook-off in a chain reaction, scattering debris across the wastes.
Then, silence.
The Eight-Legs that had served as struts scattered, clambering onto the bodies of the Vermises. Their heavy mechanical claws flared with red cutting beams. Laser cutters bit into chitin, carving wounds large enough for the machines to burrow inside and begin a systematic internal slaughter.
The Armored Wardens equipped with Atom-Pulse Cannons began to overload their own reactors, maximizing their lethality against the remaining xenos. Meanwhile, the remaining Eight-Legs hauled the crates of Peltasts, Automatons, and supplies into a rapid retreat. As for the dazed Astartes, Axion scooped them up as well. So long as their vitals remained active, they were unceremoniously tossed into the cargo crates. At this juncture, there was no room for protocol.
The Dominatrix drifted slowly toward the heart of the battlefield as a new wave of Tyranids crawled from the reclamation pools. This battle was a victory for the Great Devourer. Now, it would reclaim the biomass, reconstitute the swarm, and drown all remaining resistance.
Below, in the scorched ruins, the remaining Automated Sentry-Troopers and Armored Wardens fought a desperate holding action against crippled xenos crawling from the dirt.
But the surviving Executor tanks began to move in an erratic, synchronized pattern. They herded the Vermises together, drawing them into a tight cluster directly beneath the hovering Dominatrix. The Executors then converged on the broken remains of the Apocalypse Titan.
For a heartbeat, the world went silent.
A blinding white light erupted from the Titan's shattered core. In that final microsecond, the surrounding Executor tanks turned and plunged into the biomass of the Bio-Titans.
BOOM! BOOM!
A cataclysmic explosion released a wave of energy so violent it was visible from orbit, punching a hole through the atmosphere. A psychic scream of pure agony echoed from the surface into the void.
When the brilliance faded, the Dominatrix hovered shorn of its psychic shielding, its flesh charred and smoking. A crater over a kilometer wide marked the earth. Everything had been vaporized: the Bio-Titans, the fallen swarm, and the Iron Men. Their metallic bodies were reduced to atomic dust, drifting through the sky like a black, suffocating shroud.
The Tyranid legion that had consumed its own smaller organisms to fuel this final push was gone. Not even corpses remained.
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