A Strike Cruiser, laden with fifty Ultramarines of the Second Company and a full Great Company of their successors, the Angels of Death, arrived in the orbit of Ironward VIII. Accompanying them was a fleet of transport ships carrying over a hundred thousand Ultramarines Auxilia, all focused on the blighted moon currently infested by the rat-men.
"For our brothers and for the glory of our Gene-father, this battle must be won!" Titus, the champion of Macragge, declared with solemn intensity to his battle-brothers.
To his left and right stood his trusted inner circle: his mentor, the veteran Sergeant Major Metaurus, and Gadriel, the warrior Titus had personally promoted following their shared trial by fire.
"For Ultramar! For Guilliman!!"
One hundred and fifty Adeptus Astartes unleashed a collective roar. Their massive, transhuman frames and the polished ceramite of their power armor radiated an aura of indomitable martial might.
"Tactical data is live. Pay heed, brothers," Titus commanded, activating the hololith. A detailed map of Ironward VIII flickered into existence, overlaid with intelligence gathered on the Skaven threat. "We face a new breed of foe. Our Apothecaries have identified genetic strands within these xenos spliced from Tyranid and Ambull stock. The enemy possesses a twisted mastery of flesh-crafting. We must account for every biological variable."
Titus turned to Gadriel. "In twenty minutes, we launch a full-scale atmospheric assault to anchor the xenos' attention. While the main force engages, I will lead a veteran squad of ten, including Metaurus and Gadriel, to infiltrate the inner sanctum and reclaim the stolen gene-seed."
"By your command, Lord!" Though some felt the sting of not being chosen for the spearhead, the Astartes obeyed without hesitation.
"Then, engage!" Titus bellowed.
The Imperial Navy frigates commenced the bombardment. Lances and macro-cannon shells screamed through the atmosphere, tenderizing the surface of the moon before the landing craft, packed with the disciplined ranks of the Ultramarines Auxilia, slammed into the soil.
Clan Moulder was caught off guard by the sheer suddenness of the strike. The Auxilia vaulted from their ramps, trampling rat-corpses as they established a fortified perimeter.
But the silence was short-lived. From every crevice and tunnel, an endless tide of Skaven erupted. Wolf-rats with gnashing maws and Rat Ogres standing four meters tall, their muscles bulging beneath grafted Ambull chitin, surged toward the human lines.
Lasgun fire flickered in a desperate rhythm, scything down common vermin by the hundreds. But the momentum shifted with the arrival of the Stormfiends, monstrous amalgams of flesh and machine, their limbs replaced with Ratling cannons and warpfire throwers.
Boom-boom-boom! Roar!
Using a screen of cowering Slave-rats as meat-shields, a Stormfiend charged forward. Its massive bulk smashed aside its own kin as it unleashed a leaden storm upon the Imperial sandbag lines.
The warp-tainted rounds shredded the Auxilia's flak armor as if it were parchment. As the mortals dove for the safety of the trenches, the Stormfiend lunged like a demonic ape. The Auxilia's bayonets were useless against the beast's Ambull-plate. Even though its hands were replaced by heavy weapon barrels, a single swing of those reinforced metal bludgeons could crush Astartes power armor into a ruin of scrap.
With a backhand sweep, the monster sent several Auxilia flying like broken dolls before pivoting to hose the distant ranks with warp-bullets.
Just as the outer perimeter began to buckle, a dozen high-caliber bolt shells slammed into the Stormfiend's chest. The Ambull chitin cracked, weeping black, foul-smelling ichor.
"For Ultramar! Purge the xenos!"
The Astartes had arrived. Vaulting into the fray with bolters barking and chainswords screaming, they engaged the Stormfiends in a frantic melee. While the monsters possessed superior raw strength, the Astartes outmatched them in speed, tactical coordination, and ten thousand years of distilled combat doctrine.
In a blur of calculated violence, a chainsword bit through a Stormfiend's neck. As the titan collapsed, the Astartes did not linger in triumph; they immediately pivoted to support their brothers.
After two hours of grueling combat, the Angels of Death had lost eight brothers and six wounded, but the cost to the Skaven was catastrophic: five thousand rat-men slain, alongside twenty Stormfiends and fifty Rat Ogres. In a direct confrontation of squads, the Astartes remained the absolute masters of the battlefield.
Suddenly, a rhythmic thump-thump-thump echoed from the Skaven rear. Experienced in Moulder tactics, the Astartes immediately signaled a fallback.
Spheres of green glass shattered across the front lines, releasing billowing clouds of Poison Wind. Those Auxilia unable to reach their respirators in time screamed as their lungs and equipment melted into a caustic slurry.
Behind the fog, a fresh nightmare emerged: more Rat Ogres, packs of Wolf-rats, five towering Hell-Pit Abominations, and a literal sea of Clanrats and Slaves.
Facing this overwhelming tide, the Astartes felt no despair, only the cold, righteous clarity of their duty.
"The Imperium does not retreat! Ultramar shall be reclaimed!" the Captain of the Angels of Death 3rd Company roared, raising a storm shield decorated with the holy bones of a martyr.
Guilliman had saved their Chapter from extinction during its darkest hour; today, they would repay that debt in blood.
"For Ultramar! For Guilliman!! KILL!!"
Inspired by the demigods among them, the Auxilia rallied, bracing their lasguns against the trench lips while the Basilisk batteries in the rear hammered the encroaching swarm into red mist.
As the meat of the Moulder army clashed with the Imperial steel, Titus and his fifty Ultramarines, hidden in orbit above the true objective, received word that the diversion had succeeded.
"Titus, my visions grow dark," Chief Librarian Tigurius's voice crackled over the vox. "The enemy is commencing a blasphemous ritual. You must reclaim the heritage of the Chapter before the clock strikes the hour, or a shadow shall fall upon us all."
A tactical map appeared on Titus's display, highlighting the mission parameters. It felt strangely familiar—a clear path through a labyrinth of death.
Gadriel checked the action of his bolter, his eyes on the Chapter Banner. "Lord, this reminds me of our time together on the front lines."
"As it does me, Gadriel," Titus replied, sealing his helmet with a pressurized hiss. "May the Emperor protect. May the Light of Macragge guide us."
"Move out. Objective: Destroy the altar. Reclaim the Gene-Seed!"
THOOM-THOOM-THOOM.
The drop-ships ignited their thrusters, screaming toward the moon's surface.