The Heavy Assault Cruiser possessed blinding speed, easily outpacing even the nimbler, smaller classes of destroyers and frigates.
Higher up along the vertical plane, the Strike Cruisers held back, declining to match the breakneck advance of the assault vessel. Their purpose was long-range fire support, not reckless charges or close-quarters boarding actions. These distant warships needed only to maintain a position where their maximum engagement envelope overlapped with that of the vanguard; there was absolutely no necessity to close the distance.
Smaller enemy units posed no threat to a Heavy Assault Cruiser, while the range of Nova Cannons and Fragmentation Cannons was vast enough to bridge the expanses of an entire star system.
As the Imperial fleet spurred its engines to follow in the wake of the assault cruiser, the high-speed reconnaissance vessels, dispatched earlier under the direct orders of Jaghatai Khan to scout the perimeter, relayed back intelligence that left the Primarch deeply astonished.
There was no ambush.
Every conceivable vector had been thoroughly reconnoitered. No enemies were present; not a single enemy vessel was sighted.
Jaghatai realized instantly that the Red Corsairs had likely abandoned this sector entirely.
Conclusive pict-feeds transmitted from the Iron Men's mechanical fleet soon verified this tactical assessment. The Heavy Assault Cruiser had already closed upon the worlds heavily saturated with the corrupting influence of Chaos. With a single, devastating salvo delivered at close range, the orbital starports ringing the planets, encrusted with foul, blasphemous iconography, were utterly obliterated into spinning scrap.
Yet, the enemy's retaliatory fire was pathetic, almost non-existent.
The surface pict-captures relayed back revealed nothing but scattered, disorganized stockpiles of materiel, and wandering packs of daemonic beasts roaming the wastes. It was painfully evident that these planets had degenerated into wretched hives of the Ruinous Powers.
The only variable that had completely eluded Huron Blackheart's calculations was that neither Jaghatai Khan nor Marneus Calgar had the slightest intention of deploying ground forces to secure the terrain.
Following a brief vox-consultation, the two commanders unanimously resolved to execute concurrent decrees of Extremis Diabolus. They would subject these worlds to Exterminatus, permanently denying the renegades the ability to use them as staging grounds in the future.
As for the captured stockpiles?
The obscenely well-provisioned Ultramarines did not deign to look twice at such meager spoils. Jaghatai Khan, meanwhile, harbored an instinctive, deep loathing for anything tainted by the warp.
Axion watched the pict-feeds of the Imperial-marked materiel with complete indifference. It belonged to the Imperium anyway; how the Imperial forces chose to dispose of it was entirely their own affair. As for the Chaos-stained starports and automated defense platforms, the grueling salvage effort required to harvest such corrupted wreckage was far better spent directing the Heart of the Forge to hunt down a few Tyranid swarms.
The moment the Imperial fleet relayed their strategic decision to Axion, the mechanical fleet acted with a celerity that far outstripped their mortal allies.
Before Cyclonic Torpedoes could even be cleared from the launch tubes of the Imperial vessels, a blinding lattice of energy beams enveloped the planets. Torrential downpours of plasma cascaded from the heavens, superheating the worlds into glowing, crimson spheres of molten rock within mere minutes.
As the kinetic and thermal shockwaves rippled across the burning crusts, the hidden Cyclonic Torpedoes buried deep within the deceptive supply caches were violently triggered.
The resulting detonations tore into the heavens, casting up colossal mushroom clouds that violently breached the upper atmospheres in a terrifying display of raw destruction.
Both Jaghatai and Calgar marveled at the sheer malice of Huron's trap. Calgar's fury, in particular, burned even hotter than that of the Great Khan.
Though the Imperium had never conclusively identified the progenitor Legion of the Astral Claws, certain scholars, deducing from their tactical doctrines, had long posited that they might be a successor chapter of the Ultramarines. To Calgar, such a suggestion was nothing short of supreme blasphemy. He refused to entertain the notion that a Son of Guilliman could ever succumb to such craven idiocy, irrespective of the fact that Huron himself had never claimed lineage to the Avenging Son.
Even if it were mere slanderous rumor, Calgar could not tolerate the traitor's continued existence. The renegade had to be expunged from living memory to ensure no stain ever marred the honor of his genetic sire.
Furthermore, this arch-traitor had once dared to capture and incarcerate Roboute Guilliman himself.
"Damned Huron! That warp-rotted filth!" Calgar spat, his voice trembling with righteous rage. "A cowardly wretch who sets such vile, dishonorable traps... He is an absolute disgrace to the Imperium, a degenerate stain upon the Adeptus Astartes!"
While the joint Imperial fleet remained anchored in grim awe of Huron's desperate madness, Axion's mechanical fleet had already recalibrated its headings. Without a moment's pause, it forcibly dragged the Imperial fleet along, resuming their relentless trajectory straight through the churning heart of the Maelstrom.
On the northern fringes of the Maelstrom, an entirely unexpected engagement had erupted into full fury.
A fleet belonging to the Forge World of Lucius was currently locked in a bitter, desperate engagement against a massive armada of Red Corsairs that had suddenly surged out from the depths of the warp rift.
The epicenter of the void battle was already choked with the drifting, burning husks of dozens of warships. Crucially, more than half of those shattered wrecks belonged to the Red Corsairs.
The architects of this devastation were three Guardian-class mechanical warships, currently executing defensive maneuvers along the periphery of the Adeptus Mechanicus fleet.
This particular Mechanicus expedition from Lucius had originally been merely transiting through the sector. They had accepted an invitation from Archmagos Belisarius Cawl. Recognizing Lucius's peerless mastery over energetic matrices, Cawl had offered a technological exchange, using the advanced void shield technologies provided by Axion as leverage.
After all, the crowning achievement of the hollow Forge World of Lucius was its artificial planetary core, an engine capable of generating boundless energy. It was the most jealously guarded STC secret in their possession.
Faced with Cawl's overtures, the Magi of the Lucius Mechanicus had naturally been eager to comply. This was the technology of the ancient Iron Men, archaic, pristine, and priceless. To accelerate their transit, they had intentionally taken a hazardous shortcut, skirting the treacherous littoral zones of the Maelstrom.
To safeguard against potential depredations by the Red Corsairs, the Tech-Priests of Lucius had specifically requested the martial escort of the Legio Cybernetica, elements of the Warp Runners Titan Legion, and several allied Forge Worlds, culminating in a formidable armada.
Yet, they had never anticipated blundering directly into the path of the entire Red Corsairs fleet fleeing in mass exodus.
Huron, consumed by his own frantic retreat, had entirely failed to realize that this massive Mechanicus presence was not an interception force deployed to block his escape, but merely a passing convoy. Driven by panic and the urge to survive, Huron had summarily ordered his entire vanguard to open fire.
Subjected to a sudden, devastating ambush, the Mechanicus fleet immediately initiated aggressive retaliatory protocols.
However, as an ever-increasing deluge of pirate vessels spilled out from the shifting currents of the Maelstrom, the Magi quickly calculated the grim disparity of the engagement. Excluding three massive Planetary Arks, the entire Mechanicus fleet comprised only two battleships, a handful of cruisers, and various attendant escort frigates, totalling barely fifty hulls.
Faced with a rapidly multiplying horde of renegade vessels, the Tech-Priests soon found themselves entirely overwhelmed and forced into a defensive posture, despite the superior technological craftsmanship of their individual vessels.
Fortunately, their emergency binary distress runes were intercepted and answered with terrifying speed.
Arriving to reinforce the beleaguered line were three Iron Man tax-escort vessels that happened to be transiting the contiguous sectors. Initially, the Magi had harbored little optimism regarding these three ships; even granting their nature as ancient automata, they did not anticipate three hulls could fundamentally alter the strategic calculus of the battle.
The reality, however, proved to be an exercise in profound irony.
The moment the three Guardian-class vessels translated into weapon range, they unleashed the full, terrifying majesty of their arsenals. These moderately sized mechanical hulls unleashed a sustained volume of firepower that completely eclipsed that of Imperial capital ships. Furthermore, the destructive yielding of each individual macro-salvo significantly out-damaged the heaviest primary batteries of the Mechanicus warships.
The three vessels wove through the engagement zone in perfect, synchronized patterns, their firing arcs crossing with lethal precision. Every singular discharge of their weapons systems reliably vaporized a renegade cruiser or tore multiple escorts and destroyers into expanding clouds of atomic dust.
Their operational efficiency was terrifyingly absolute.
Even the sparse squadrons of heavy combat drones they deployed were so lethal that a mere handful could completely systematically cripple a renegade destroyer within seconds. Throughout the brief, frantic engagement, the overwhelming majority of confirmed kills were attributed directly to those three Guardian-class mechanical ships.
Beholding the sudden intervention of these ancient machines, vessels explicitly designated to guard the collection of the Iron Men's tithes, Huron felt a cold, suffocating dread seize his chest.
"The Imperial tithe follows us like maggots on a corpse!" Huron roared, his face contorted in a mask of fury. "Why do these soulless iron monstrosities offer succor to these miserable Tech-Priest vermin?!"
Yet, despite his towering rage, Huron retained his cold, pragmatic survival instincts. He knew with absolute certainty that the reaction time and strategic deployment speed of the Iron Men's vessels were terrifyingly brief. If his forces allowed themselves to become bogged down here, more of those mechanical nightmares would inevitably converge upon his coordinates from every sector corner.
Worse still, an immense, vengeful armada was actively hunting him from deep within the Maelstrom itself.
If he allowed his fleet to be delayed any longer, a few shattered remnants might escape, but the vast empire of terror and military might he had meticulously forged over nearly two centuries would be utterly annihilated.
Meanwhile, deep within the twisting distortions of the Maelstrom, guided unerringly by quantum positioning arrays, the mechanical fleet continued its relentless, breakneck pursuit, dragging the war-hungry fleets of the Ultramarines and the White Scars directly toward the traitors' flanks.