The match began instantly.
No hesitation. No testing of reflexes. No circling for the crowd.
Just raw, practiced violence released the moment the signal rune flashed above the arena.
The two gladiators closed the distance across the blood-soaked sand, their footsteps pounding over iron dust, old bone fragments, and dark stains that had sunk too deeply into the floor to ever be washed clean. The air stank of machine oil, rust, sweat, cheap incense, and the old sweetness of death baked into hot metal.
Around them, the coliseum screamed.
Thousands of throats howled for blood from behind iron bars, armored viewing galleries, and stacked balconies draped in torn banners. The poorest spectators stamped their boots until flakes of corrosion rained from the stands. The wealthier ones leaned forward behind tinted shields, drinking imported amasec while slaves held perfumed cloths beneath their noses.
At exactly ten meters apart, the announcer's amplified voice thundered from the vox-horns mounted around the arena.
"LET THE SLAUGHTER BEGIN!"
Grox lunged first.
He was a cybernetic titan of muscle, grafted steel, and butchered flesh, but his size did not slow him. Servo-motors whined inside his hips and spine as he crossed the remaining distance with terrifying speed. His bladed arms snapped outward, monomolecular edges catching the arena lights in thin, murderous lines.
Heavy Hammer did not dodge.
He shifted his weight instead, turning his left side toward the strike as if the movement had come half a heartbeat too late.
Grox took the offering.
The blade sliced through Heavy Hammer's left arm at the elbow in one clean motion. Flesh parted. Bone flashed white. Crude cabling snapped and spat sparks. The severed limb hit the sand with a wet metallic thud.
The crowd roared.
Grox's follow-through carried him one step too far.
That was all Heavy Hammer needed.
The pincer mounted beneath his remaining arm snapped shut around Grox's right leg with bone-crushing hydraulic force. The clamps bit through armor plating, flesh, and reinforcement struts. Grox's vox-grille emitted a burst of static that might have been surprise.
Then Heavy Hammer's rotary servo-drill spun to full power.
The sound was not a whine. It was a scream of machine teeth chewing through metal under impossible strain. The drill punched into Grox's trapped leg, caught, and tore. Pistons burst. Wet meat shredded. Reinforced bone splintered beneath the rotating head.
Grox's leg came free in a spray of blood, oil, and shredded cabling.
The shriek of rending metal and ruptured flesh drowned out even the spectators. Grox crashed onto the arena floor hard enough to throw sand in a wide ring around him. For a moment, his massive frame convulsed, one hand digging trenches through the blood-dark grit as broken augmetic impulses fired through a limb that was no longer there.
Heavy Hammer staggered backward at the same time, his balance ruined by the loss of his arm. He did not cry out. He did not even look at the stump. His breathing rasped through his mask, steady and harsh.
The two combatants separated.
Grox dragged himself upright on his remaining leg, his bladed arms scraping against the sand for support. Viscera hung from the torn socket at his hip. Hydraulic fluid pumped in uneven spurts from severed conduits, mixing with blood beneath him.
Heavy Hammer, without ceremony, bent down, retrieved his severed arm, and shoved it into the bolted storage compartment mounted across his back.
The gesture was calm. Efficient. Almost routine.
The crowd loved it.
Their frenzy intensified, not because they admired skill, but because they recognized devotion. A man who would trade his own limb for a better killing angle was a man worth cheering in this place.
The second exchange began before the announcer could speak again.
"DIE!"
Grox's distorted vox-grille shrieked through the coliseum. His remaining leg pistoned beneath him, launching his mutilated bulk forward. His dual blades came up, poised to gut Heavy Hammer from throat to groin.
Heavy Hammer did not retreat.
He charged.
At first, his movement was slow, uneven, and heavy, his body compensating for the missing arm and the pain screaming through damaged nerves.
Then faster.
And faster.
His armored feet hammered the arena floor. Sand jumped beneath each step. His roar rose through the din until even the crowd seemed to fall beneath it.
"THE BLESSINGS OF THE CHAMPION OF BLOOD ARE UPON ME!"
The collision was not a contest.
It was an execution.
Heavy Hammer struck Grox with the full weight of his augmented body. The impact folded Grox backward and drove him into the ground. His blades scraped uselessly across Heavy Hammer's armor, throwing sparks but finding no purchase before the pincer-arm rose above him.
It came down.
The first blow caved Grox's face inward. His eye lenses burst, one spraying fluid and the other popping free in a wet arc across the sand.
The second blow shattered the skull beneath the plating.
The third split bone, metal, and brain matter across the arena floor.
A final wet crunch rolled outward.
Then silence.
For one long second, the coliseum seemed to hold its breath.
Then the applause came down like a storm.
Heavy Hammer stood amid the carnage, one arm missing, pincer dripping, body shaking from pain and adrenaline. He reached down, seized what remained of Grox by the torn spine and shoulder plating, and lifted the corpse high.
"FOR THE CHAMPION OF BLOOD!"
The crowd screamed in rapture.
The hive's filthiest, most forsaken souls howled back at him. Criminal princes. Pit-gangers. Slavers. Spire degenerates in masked galleries. Underhive scum packed shoulder to shoulder behind the bars. All of them united by the same faith for one perfect moment.
Blood. Violence. Victory.
This was their sacrament.
Heavy Hammer did not immediately leave the arena.
Instead, he dragged Grox's corpse along the outer edge, marching past the iron barriers that separated gladiators from spectators. He paraded the kill before them, letting severed limbs scrape through the sand, letting blood streak the arena wall, letting the crowd lean close enough to be splashed.
He basked in their adulation because, in this place, adulation was food, armor, medicine, and proof that he had survived one more day.
....
High above the arena, in the VIP viewing deck, Klein leaned back in his seat with open amusement.
"That bastard is insane."
He clapped slowly, grinning despite himself. Around him, servants refilled cups, armed guards watched the exits, and the glass barrier separating the nobles from the stink of the pit trembled faintly under the crowd's noise.
"Trading an arm just to secure a win," Klein said. "Completely ruthless. Completely mad. I almost respect it."
Grey was no longer watching the arena.
His gaze had shifted to Grot.
He had expected the Thunderborn warrior to enjoy the spectacle. Grot was not delicate. He was loud, direct, and more comfortable around broken bodies than most men were around dinner tables. A pit fight should have amused him, or at least held his attention.
Instead, Grot stood motionless beside the viewing rail.
The massive warrior was trembling.
Not with fear. Not with battle-hunger. Something worse. Recognition had struck him with such force that even his armor seemed too heavy for him. His helmet hid most of his face, but Grey saw the way his gauntleted hands clenched against the railing hard enough to bend the metal.
Then one word thundered across the coliseum.
"ANTARA!"
Grot's voice boomed over the crowd, raw enough to tear through the layered noise.
"IT'S ME!"
Heavy Hammer froze.
His massive cybernetic head turned. For a moment he scanned the stands like a hunting machine, optics shifting, body still half-crouched over Grox's corpse.
Then his gaze locked onto the VIP deck.
He saw the military officer. He saw Grey. He saw the towering warrior beside them.
Grot tore off his helmet. The seals hissed open, and his scarred face emerged into the harsh arena light. He rushed to the edge of the platform, waving with both arms like a man trying to reach across years instead of distance.
Heavy Hammer stared.
For one impossible heartbeat, the arena champion vanished, and the man beneath the grafts looked out through the mask of steel.
Then Heavy Hammer threw Grox's corpse aside and waved back with equal intensity.
The two brothers bellowed across the arena, but the crowd swallowed their words. Spectators thought it part of the performance and roared louder. Some laughed. Some shouted demands for another killing. None of them understood that a family had just found itself in the middle of a slaughterhouse.
Grot pointed toward the gladiator entrance where Heavy Hammer had first emerged. His movements changed, becoming sharp and deliberate. A quick series of hand signals followed, old gestures learned long before Thunderborn armor, before the Underhive, before war had turned them into different kinds of monsters.
Meet me there.
Heavy Hammer's exuberance faded.
His posture changed at once. The arena champion returned. His head lowered. His shoulders tightened. Whatever joy had risen inside him was buried beneath caution, fear, and hard-learned survival.
Without another word, he turned and disappeared into the gladiator gate.
....
Backstage.
The chamber behind the arena was cleaner than the pit only because blood there was wiped away between performances. The floor was ribbed steel, sloped toward drainage channels clogged with clots, scrap, and chemical foam. Surgical lamps hung from mechanical arms over bolted benches. Tool racks lined the walls, each instrument marked more for speed than mercy.
As reward for his victory, the arena's tech-priests replaced Heavy Hammer's missing limb.
They did not ask permission. They did not offer comfort. They chanted binharic fragments through cracked vocal implants while servo-arms held him down and flesh-hooks pulled the stump open. Anesthetics were used sparingly. Pain taught obedience, and the arena did not waste good chemicals on property.
A crude electro-sword was grafted into place.
The augmetic was functional. Deadly, even. The blade hummed with unstable power as current crawled along its edge. Its socket locked into Heavy Hammer's shoulder with a series of brutal clamps and nerve-spikes. It responded to impulse, after a fashion. It could kill. It could parry. It could make the crowd cheer.
It was not a hand.
It was not restoration.
It was a weapon installed where a man's arm had been.
As the procedure neared completion, the door opened.
A familiar figure entered, escorted by the cybernetic woman who had led the visitors earlier. The woman's metal legs clicked against the floor with precise, predatory rhythm. Her expression remained professionally blank, but her optics lingered on the half-attached augmetic for a fraction longer than necessary.
Heavy Hammer stood abruptly.
The electro-sword assembly hung from his shoulder by exposed leads, twitching uselessly as the graft failed to complete its calibration cycle. A tech-priest gave an irritated burst of machine-static, but Heavy Hammer ignored him.
He dropped to one knee.
"Mentor."
The cybernetic woman nodded once, accepting the greeting without softness. Then she gestured toward Grot.
"This is an elite bodyguard of the First Legion's commander. He wished to meet our esteemed gladiator."
Heavy Hammer bowed lower until his forehead nearly touched the blood-slick floor.
"Honored lord, I offer you my respect."
Grot took one step forward.
Then stopped.
Up close, there was no denying it. Beneath the steel, beneath the scars, beneath the arena name and the butchered body, this was Antara. His brother. His blood. The boy who had once stolen ration crumbs and lied badly about it. The young man who had laughed too loudly in hab-corridors and dreamed of something better than being ground down by the hive.
"Antara…" Grot's voice shook. "I… I…"
For the first time in his life, Grot had no force to put behind his words. No joke. No order. No roar. His massive frame trembled inside armor built to withstand heavy weapons fire.
Finally, he turned to the escort, jaw clenched hard enough to make the muscles jump.
"I need to speak with him. Alone."
The cybernetic woman studied him for a moment. Whatever she saw in his face made argument unnecessary.
She gave a curt nod.
"Clear the room."
The tech-priests protested in crackling machine-code until her gaze cut toward them. Their protests died into static. Servitors withdrew. The surgical arms retracted. The escort stepped out last, sealing the door behind her.
The moment they were alone, Heavy Hammer rose.
The electro-sword still hung loose from his shoulder. His balance was wrong. His body was half-open and half-repaired. None of that mattered.
He crossed the room and embraced Grot.
"Brother…" Heavy Hammer's voice broke through his vox-grille. "My brother…"
Grot clutched him tightly.
His hands shook as they found cold steel where flesh should have been. He felt the hard plates bolted into Antara's torso, the exposed cabling beneath them, the uneven vibration of cheap power feeds struggling to keep damaged organs and crude augmetics functioning in the same body.
Ceramite plating rattled loosely over scavenged reinforcement ribs. Some pieces had clearly belonged to dead pit fighters, others to industrial servitors, and a few to machines never meant to be implanted into human flesh. Beneath the plating, the flesh-to-metal grafts were rough and unclean, burned at the seams by rushed work and unholy fusion techniques.
The smell struck Grot hardest.
Scorched meat. Antiseptic. Unfiltered coolant. Ozone from overloaded nerve-links.
This was not a warrior's augmentation. It was not even a proper PDF bionic replacement.
It was cheap. Brutal.
A mockery of wholeness, built only to keep a slave alive long enough to kill and be killed for paying spectators.
Grot could feel tremors running through Antara's frame. Some came from emotion. Others came from erratic power surges crawling through unshielded circuits. Even now, Heavy Hammer's remaining organic muscles twitched out of rhythm with his augmetics. The newly grafted electro-sword jerked once, then went still, failing to synchronize properly with his nervous system.
Grot's throat tightened until speech hurt.
"What…" he whispered. "What happened to you?"
Heavy Hammer did not answer immediately.
The two simply held each other in the harsh white light of the surgical chamber, surrounded by tools meant to cut men apart and put them back together just well enough to suffer again. Their massive frames shook with silent sobs neither of them had the strength to hide.
For the first time in years, their family was no longer only a memory.
Yet it was not whole.
It had been broken and sold by the pound.
Finally, Heavy Hammer spoke.
"The day after you went to the Underhive, they came for us."
Grot went still. Heavy Hammer's voice was low now, stripped of arena bravado.
"They said you had defected to the traitors. They said your blood made us suspect. Kin to a heretic." His jaw clenched. "They called it a redemption tithe. Five hundred Thrones."
Grot's face twisted.
"Five hundred?"
"A soldier's wage is barely twenty Thrones a month," Heavy Hammer said. "They knew we couldn't pay. That was the point."
Grot's stomach twisted with rage so sudden and hot that for a moment all he could hear was his own pulse.
Heavy Hammer continued.
"We begged. Mother's old friends looked away. The hab-clerk said the judgment had already been stamped. The enforcers told us to thank the Emperor we were being given a chance to redeem the family name instead of being shot in the corridor." His voice roughened. "We had no way to pay. So they turned our debt into chains."
Grot's hands curled into fists. Armor servos whined as they compensated for the pressure.
"They took our sister," Heavy Hammer said. "They sold me."
The words landed like blows.
"She disappeared into the debt markets. I was sent to the manufactorums. Deep labor first. Then the pit crews. Then the arena." He gave a short, dead laugh. "I became a Deep Pit Slave."
Grot closed his eyes. Behind them, he saw old hab corridors. A younger sister running ahead of them. Antara laughing. Himself swearing he would come back. Himself never coming back in time.
"A week ago," Heavy Hammer said, "I killed my overseer and escaped."
Grot opened his eyes.
"You escaped?"
"For six hours." Heavy Hammer's mouth twisted beneath the edge of his mask. "Then the arena hunters found me. They said I had good instincts and better rage. They forced me into the pits. Two days of training before my first match. No rest. No treatment. Just weapons, pain, and instruction."
He reached into his vest with his remaining usable hand and withdrew a small figurine.
It was ugly, heavy, and lovingly worn by desperate fingers. A gladiator stood atop a mound of bodies, holding a chain of severed skulls in one hand and a broken prisoner in the other. Its painted eyes were red. Its mouth was carved into a triumphant snarl.
Grot recoiled as if struck. The blood drained from his face.
"No…"
Heavy Hammer looked down at the figurine, then back at him.
"A veteran pit fighter gave it to me. He taught me to endure. He taught me to stop begging. He taught me that the Champion of Blood blesses those who take what they are owed."
"No," Grot said again, louder this time. "Antara, you can't. You can't forsake the Emperor."
His voice cracked.
"I fought beside His chosen. I saw miracles with my own eyes. I saw men dragged out of death because someone still gave a damn. The Emperor—"
"Where was the Emperor?"
The question cut through him.
Heavy Hammer's expression hardened, cold as the steel grafted into his flesh.
"When they called you a traitor, where was the Emperor?"
Grot had no answer.
"When they sold our sister, where was the Emperor?"
Grot's mouth opened, then closed.
"When they chained me to a manufactorum line until my hands split open? When they cut me apart and bolted scrap into my body? When they made me kill for nobles who laughed while I bled?"
Heavy Hammer stepped closer. The crude electro-sword twitched from his shoulder, throwing a brief, unstable crackle of blue-white light across the room.
"Where was the Emperor then?"
Grot stared at him.
He had fought beside Qin Mo. He had seen impossible weapons built from ruins, men saved from certain death, heretics burned, psykers silenced, fortresses raised, and armies clothed in armor no PDF regiment should have possessed. He had called those things miracles because no other word had seemed large enough.
But none of those miracles had reached his family.
None had stopped the clerk.
None had saved his sister.
None had kept Antara from the pit.
Heavy Hammer gripped Grot's shoulder. The pressure was uneven, one side flesh and one side machinery, but the intent beneath it was painfully familiar.
"We will find our sister," he said.
Grot swallowed hard. His rage had nowhere clean to go.
Heavy Hammer's face darkened. Not with grief now. With purpose.
"But first—"
He leaned closer, voice dropping into something colder than the arena roar.
"We make the bastards pay."