Magos Majoris Iomene-35 did not need emotion to understand the dire nature of what was unfolding. The wards on every level flickered and faltered, overwhelmed by the impossible surge of power that tore through the fabric of reality. The Warp Geiger's warning klaxons screamed across the Castellum, drowning out all other sound.
"Emergency warp breach detected. Multiples confirmed. Daemon-class signatures: 88. Type: Bloodletters."
The bloodthirsty laughter of the Immaterium echoed throughout the halls, followed by the stomping march of war.
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Vehlaris-00302 stood at the head of his battle-automata cohort, issuing binary orders as the Castellum's forces scrambled to meet the incursion. Hexagrammic wards glowed along the sleek chassis of the automata, their forms designed to withstand psychic interference. But this was no petty incursion—The wrath of the Realm of War had gathered strength, and 88 Bloodletters now prowled through the sanctified halls, swinging hell-forged blades that cut through steel and ward alike.
The first wave hit Chamber Theta. The battle-automata engaged immediately, sending bursts of plasma fire and volkite beams into the red-skinned horrors. Yet for every Bloodletter destroyed, two more leapt forward, their daemonic swords howling with unholy energy, slicing through automata with ease.
"Mechanized units compromised. Forty percent of automata forces lost—redirecting reinforcements."
Vehlaris cursed in binary. The enemy was tearing through them faster than expected. These weren't ordinary warp incursions—they were shock troops of the Realm of War, and they fought not only to kill but to desecrate. No ground was won, only stolen.
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Iomene-35 coordinated from the primary cogitation core, her mechadendrites plugged directly into the Castellum's central command system. The Greater Machine Spirit systems were strained, processing thousands of combat feeds simultaneously, calculating probabilities of survival, and coordinating fire teams and automata units. For every data-packet fed to her, she made a decision—who lived, who died, where to fortify, and where to abandon.
The Castellum's layout, designed for exploration and containment, not war, became a disadvantage. Entire hallways had to be sealed off, locking out the advancing daemons—but also trapping personnel. Sacrifices had to be made.
"We bleed today," Iomene whispered, voice laden with synthetic coldness, "so that we do not bleed tomorrow."
But the Bloodletters were not merely physical threats. Their presence corrupted the Machine Spirits, gnawing at the heart of the Castellum's sacred infrastructure. Servo-skulls malfunctioned, security doors opened at random, and turrets targeted friendly units as the daemonic presence wormed its way into the station's machine-soul. The Castellum was bleeding from within.
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"Emergency report: Cogitation Core breach imminent. Daemonic incursion at Level 5."
The Cogitation Core housed the most sacred of data matrices, the heart of the Empyric Engineers' research. If the Bloodletters reached it, decades of progress would be obliterated in moments—and worse, the corrupted systems could become conduits for future warp incursions.
Magos Majoris Vehlaris-00302 knew what had to be done. He would not let the Machine God's work be defiled.
"Redirect automata reinforcements. Hold the core at all costs. We cannot allow them to claim it."
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The automata reinforcements, battle-worn and damaged, took up positions along the core's access halls, their warded chassis sparking from earlier battles. Behind them, Magos Vehlaris and a group of tech-priests readied their final defenses, chanting litanies of fortification even as the psychic strain weighed upon their minds. The Warp Geiger's needle quivered dangerously close to the red zone.
The Bloodletters stormed the corridor, their blades blazing with warp-flame, each step pounding like the beat of a war drum. The automata opened fire, filling the hall with roaring plasma blasts and the hiss of volkite beams. But the minions of the Realm of War reveled in the carnage, cutting down the automata as if they were mere toys.
Vehlaris knew their doom was approaching, but retreat was not an option.
"For the Machine God," he whispered, locking his optical sensors onto the Bloodletters as they charged.
With a single gesture, he ordered the last automata unit—a heavily damaged siege-automaton—to detonate its plasma core. The resulting explosion engulfed the corridor in searing light, vaporizing both friend and foe alike.
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The explosion bought enough time. Iomene-35, still embedded in the core's command systems, executed the final phase of her emergency protocol. Localized hexagrammic wards flared to life, severing the warp-breach and sending the surviving Bloodletters howling back into the Immaterium.
Silence fell over the Castellum—an unnatural silence, heavy with the stench of burned metal and daemonic ichor. The cost had been staggering. The battle-automata forces were all but annihilated, and many tech-priests lay dead or broken, their minds shattered by the psychic onslaught.
But the Cogitation Core remained intact. The knowledge was preserved. The Castellum had endured, bloodied but unbroken.
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Vehlaris-00302 staggered through the wreckage, his robes scorched and his limbs damaged from the blast. He stepped over the remains of automata, the red runes of their hexagrammic wards flickering weakly. The Machine God's work continued, but at great cost.
Magos Iomene-35's voice crackled over the vox-link, weary but resolute.
"We survive."
Vehlaris nodded, though no one could see. Survival was not enough. The incursion had shown them their vulnerabilities, and now those flaws had to be corrected. The Castellum would not fall again.
The halls would be cleansed. The defenses rebuilt. The Machine Spirits soothed. And when next the denizens of the Immaterium dared challenge the Empyric Engiseers, they would be met with cold iron, burning plasma, and unyielding faith.