As the Thunderborn ceased their saboteur strikes, the sudden silence of the vanguard left only the hollow aftermath of their passage behind.
Venomfang's forces surged forward to assess the damage, expecting scattered resistance, salvageable command posts, or at least some sign of the enemy who had gutted their lines.
Instead, they found only a wasteland of blasted ruins, smoldering wreckage, and twisted ferrocrete skeletons where proud towers had stood minutes earlier. Ash drifted through the broken avenues in gray curtains. The air stank of ionized smoke, hot metal, ruptured fuel cells, and the bitter chemical tang of burning insulation. Every breath scraped the throat.
Confused and seething, the heretics scoured shattered spires and broken thoroughfares with weapons raised, but there was nothing to shoot. No retreating silhouettes. No bodies. No vox signatures. No enemy banners. Only the evidence of destruction carried out with infuriating precision.
Meanwhile, word of the obliterated command center had not yet reached High Command. The frontline units were severed from their orders, their commanders, and the chain of authority that held them together.
Bereft of fresh directives, the heretic units began a hasty withdrawal to their pre-assigned defensive positions. They did not do so because the maneuver made sense anymore. They did it because the old deployment plans remained the last instructions anyone could confirm. Like servitors obeying a dead master's final command, they moved by habit into positions already rendered obsolete.
Within minutes, five key defensive sectors in the westernmost districts of the Upper Hive ignited into chaos, each caught in the opening storm of a sudden, coordinated assault.
From every direction.
Autonomous artillery batteries, loyal to nothing but their targeting protocols, commenced a ruthless bombardment that stretched from the northern foxholes to the southernmost outposts. Their barrels adjusted in cold increments. Stabilizers bit into the ground. Targeting cogitators marked bunkers, trench lines, ammunition stores, vox relays, and troop concentrations with indifferent accuracy.
Then the sky split open.
Shells screamed overhead in burning arcs, each one a measured sentence of annihilation. The once-pristine upper atmosphere of the hive twisted into a sickly orange haze, backlit by fire and ruptured ozone, until even the sun vanished behind ash and smoke.
Explosions tore through ancient fortifications. Venerable structures that had survived riots, sieges, and centuries of neglect collapsed under repeated impacts. Hardened emplacements cracked, buckled, and disappeared beneath rolling clouds of dust. Reinforced walls held for a few seconds, then failed under the next salvo.
Infantry huddled in cramped bunkers with weapons clutched in trembling hands. Some muttered invocations to the Lord of Wisdom, pleading for foresight, protection, or simply a few more breaths beneath the relentless shelling. Others stared at the walls as dust shook loose around them, too frightened even to pray.
Even high-ranking officers lost the polish of command. Their voices shook as they crowded into buried command posts and sent frantic reports up the chain.
"The enemy has teleported in!"
"We are under heavy bombardment!"
"Requesting immediate reinforcement!"
Yet, there was only static in reply.
Even requests to withdraw, orders that should have been met with curses, reprimands, or immediate countercommands, vanished into silence. No denial came. No permission came. No voice came at all.
Stripped of command, the officers retreated deeper into their shelters and whispered thin prayers beneath the oppressive thunder of war. Outside, the screams of incoming shells never stopped. With every detonation, the ground kicked and shuddered as if the hive itself were trying to tear free of its foundations.
Amid the explosions, the wounded could still be heard. Their cries rose from collapsed trenches, burning bunkers, and shattered firing pits, only to be swallowed again by the artillery's roar.
Above the battlefield, recon drones glided through the smoke like silent, unblinking predators. Their lenses swept over the defensive sectors, scanning heat signatures, movement, muzzle flashes, vox emissions, and the faintest biological traces leaking through cracked ferrocrete.
Every surviving enemy combatant was marked, digitized, and relayed in real time to the artillery control network.
By the fifth wave of shelling, the targeting algorithms had finished refining their work.
Those who had survived the first bombardments began to believe they had been spared by divine will. Men crawled from collapsed firing steps. Officers tried to reestablish local command. Medics dragged the wounded behind partial walls and broken armor plates.
Then the whistling began again.
This time, the shells did not fall near them.
They fell exactly where the drones had told them to fall.
"Boom∼! Boom∼! Boom∼!"
Each impact battered the defensive lines with precise cruelty. Shells detonated just outside bunkers, along trench mouths, beside collapsed escape routes, and against support columns already weakened by earlier strikes. Molten shrapnel punched through firing slits. Blast pressure rolled through cramped interiors. Reinforced walls cracked under repeated, deliberate abuse.
Inside the shelters, soldiers flinched at every impact. Their prayers faltered as hope shrank into the narrow space between one explosion and the next.
Then the first bunker began to fail.
Hairline cracks spiderwebbed across the ceiling. Dust rained in pale streams. The men inside stared upward in frozen silence, every face lit by the flicker of emergency lumen strips and the red glow of warning runes.
A final shell punched through the weakened roof and detonated inside.
Flame, pressure, shrapnel, and shredded flesh erupted from every breach. Entire squads vanished in a single moment, not as warriors, not as martyrs, but as debris thrown into the choking air.
The same pattern repeated across the defensive sectors for three hours.
Bunkers cracked. Trenches collapsed. Ammunition stores cooked off. Vox relays died one by one. The shelling did not rage blindly. It studied, corrected, and finished what it had begun.
When the last shell found its mark, the artillery drones transmitted resupply requests. Teleportation fields swallowed the spent platforms and folded them back toward the Underhive, where fresh munitions waited in prepared depots.
The moment the bombardment ceased, the First Legion advanced.
At the northernmost defensive line, the few survivors had barely lifted their heads from the rubble before the ground began to tremble again. Not from shells this time, but from the disciplined thunder of approaching troops.
Through the smoke came armored infantry clad in sealed ceramite power armor, marching in ordered ranks beside hovering Leman Russ tanks whose gravitic engines growled beneath their hulls. Bolters cycled. Lascannon capacitors charged. Targeting lenses glowed cold through the haze.
More infantry followed behind them, spreading with methodical precision through the ruined streets. Their helmets turned in sharp, synchronized movements as auspex feeds marked heat signatures beneath rubble, behind walls, and inside shattered pillboxes.
Every las-shot had purpose. Beams punched through exposed throats, shattered visors, severed limbs, and dropped fleeing enemies before they could reach cover. The soldiers did not fire wildly. They fired like men who had been taught exactly how ammunition, distance, and fear should be spent.
The hovering Leman Russ tanks unleashed coordinated salvos. Rockets screamed forward in rippling waves, striking bunkers already weakened by artillery and turning them into fountains of fire and broken ferrocrete. A full company of armored behemoths advanced in formation, their gravitic suspensors holding them steady above shattered streets that would have trapped ordinary treads.
Soon, the entire battlefield burned.
Buildings imploded in cascading firestorms. Trenchworks dissolved into molten scars. Metal-plated avenues blackened, warped, and cracked beneath repeated strikes.
By the time the smoke thinned, the northern defensive line no longer existed as a military position. It was a field of craters, flame, and cooling slag.
Not a single heretic remained standing.
The two attacking regiments swept through the ruins and initiated bio-scans. Any surviving life signs were identified, verified, and executed without hesitation.
The soldiers had been hardened by war, but not made careless by it. They checked bodies. They cleared rubble. They marked unexploded munitions. They moved through the aftermath as instruments of disciplined retribution.
Some of the dying heretics stared up at them with scorched faces and wide, disbelieving eyes. Perhaps regret touched them in those final moments. Perhaps they understood, too late, that blind faith in the Lord of Wisdom had led them not to enlightenment, but to ash.
No one stopped to ask.
Once the northernmost defensive line was secured, the two regiments halted among the smoldering ruins and waited for their comrades to finish clearing the other four trench systems. After that, all five assault groups would be transmitted to the next battlefield.
The war no longer moved at the pace of marching columns and supply convoys.
It moved at Qin Mo's pace.
....
Ever the vanguard, the Thunderborn carved their path ahead of the main advance.
With most regular forces committed to neutralizing secondary defensive positions, the Thunderborn were free to concentrate on critical objectives: command nodes, artillery observers, armored reserves, shield generators, and fortified points too stubborn or too valuable to waste infantry lives upon.
Grey tore through three dilapidated buildings in succession, his warplate smashing through walls weakened by age and bombardment. He charged into a fortified chapel through a side nave, shoulder cannon already tracking, and cleared the entrenched heavy weapon teams before they could pivot their guns.
A heavy stubber crew died before their feed belt finished cycling. A missile team vanished beneath a burst of controlled plasma. A vox-priest wearing flayed parchment charms raised a hand to curse him and lost the hand, the arm, and the wall behind him to a single lascannon discharge.
When the chapel fell silent, Grey paused beneath a cracked statue whose face had been hacked away and replaced with the angular sign of the Lord of Wisdom. Tactical schematics flickered green across his HUD as he consulted his data-link. The display confirmed his proximity to the second enemy defensive sector.
For the first time since the assault began, he stopped to consider the shape of the enemy's strategy.
The heretics had not simply thrown up barricades and hoped for the best. They had constructed five layered defensive lines along the southern approaches to the Upper Hive, each line positioned to bleed an advancing army before forcing it into the next kill zone. Minefields, artillery corridors, anti-armor nests, fallback routes, and concealed reserves had been arranged with real military discipline.
On paper, it was a competent defense.
But Anruida's pre-planted teleport beacons in the western sector had allowed the First Legion to bypass the main front entirely. Instead of walking into the prepared killing ground, they had struck from the flank and rear, where the defensive logic collapsed under its own weight.
Grey had originally assumed Qin Mo intended to teleport directly into the heart of the heretic lines and overwhelm them through shock.
Now he understood.
Qin Mo had not merely chosen a different entry point. He had invalidated the entire defensive design before the first shell fell.
"I see a fortress."
Yoan's voice crackled over the vox-link.
A moment later, coordinates appeared on Grey's HUD. His enhanced optics shifted focus, cutting through smoke, broken walls, and heat shimmer to map the target's contours.
To the unaided eye, it looked like a modest cluster of old buildings pressed together around a square courtyard. Nothing about it stood out from the surrounding ruin.
Grey's sensors told a different story.
Behind the outer walls lay layered reinforcement, internal firing galleries, ammunition rooms, armored stairwells, and a geometrically precise central keep. The structure was not a random hab-cluster. It was a perfectly square stronghold disguised by centuries of decay.
"Another relic of a millennia-old hive?" one Thunderborn asked.
"Most likely," Grey replied.
Yoan studied the scan for another second. "Roof access is weakest. Internal defenses point outward and downward, not up."
Grey nodded. "Then we take the roof first and clear downward."
No further discussion was needed.
The Thunderborn moved.
The stronghold was stout, but it was no Wall of Koy. Its walls were high enough to repel ordinary infantry, vehicles, and siege ladders. They meant little to warriors in Thunderborn-pattern warplate.
Each warrior scaled a nearby building, servo-muscles driving armored fingers into cracked ferrocrete and exposed metal ribs. One by one, they reached the rooftops, crossed them in bounding strides, and leapt toward the fortress. Jump packs fired in short, controlled bursts, correcting angle and speed rather than carrying them like aircraft.
They descended from multiple angles and landed on the roof at the same time.
The impact shook the structure. Dust burst from old seams. Roof sentries stumbled, weapons half-raised, minds still struggling to understand how the enemy had appeared above them.
Panic seized the defenders.
Some fired at Grey. Others turned toward Yoan. A heavy weapon operator tried to swing his autocannon around and struck his own ammunition loader with the barrel. For three fatal seconds, the defenders could not agree on which threat to kill first.
By then, most of them were already dead.
Grey's shoulder cannon cut across the roof in a controlled sweep. Grot's hammer crushed a sandbagged weapon pit and the men sheltering behind it. Anruida dropped through a maintenance hatch and killed the squad waiting beneath before they understood the breach had begun.
The roof was secured in seconds.
Then the Thunderborn went down.
They breached through access hatches, ventilation shafts, collapsed stairwells, and holes punched directly through the roof plating. Gunfire and screams filled the fortress interior. Energy beams lanced through walls. Doors were not opened so much as removed. Squads waiting in prepared corridors died when the Thunderborn ignored the obvious routes and struck through floors, ceilings, and side chambers.
Inside the fortress, the heretics tried to rally. Officers shouted orders. Vox casters spat static. Heavy weapons were dragged toward internal choke points. None of it mattered for long.
The Thunderborn moved with brutal precision, their combat links feeding sightlines and target data between them in real time. One warrior suppressed. Another breached. A third eliminated anyone attempting to withdraw. Every room cleared created the angle for the next. Every corpse blocked a route the defenders might have used.
From the outside, the fortress shuddered as its garrison was dismantled from within. Muzzle flashes lit firing slits. Explosions punched dust from ancient walls. Screams rose, broke, and were cut short.
The Thunderborn had fought too many campaigns to be distracted by slaughter. Their focus remained absolute: clear the structure, locate command assets, eliminate resistance, and move on before the enemy could reorganize.
Yet amid the thunder of gunfire, collapsing doors, and dying men, none of them noticed the silent presence watching from beyond the immediate battle.
They were being watched.