I Reincarnated as a Demon King,I Will Kill Everything

The circle above the Black Spire split again.

Not a line this time. Not a whisper of silver light. It opened like an eye, round and merciless, pouring pale fire onto the battlefield below. The first Custodian's steps already shook Hell's floor, but the second presence made the obsidian itself whine like tortured metal.

Noa pulsed hard in my gauntlet. His voice was steady but urgent.

"My Lord,a second Custodian confirmed. Choir resonance—tripled. Estimated probability of victory at current level: thirty-nine percent."

I licked blood from my teeth and smirked. "Thirty-nine is higher than zero. That means we fight."

Selena's laugh carried frost. "Finally, something interesting."

Nana raised her shield, her muscles trembling under the weight of the Custodian's last blow. "My Lord, say the word."

Rena's eyes gleamed under the dark visor of her armor. "I will cut whatever stands in your way."

Zereth's voice rasped like stone cracking. "We bleed now, or we bleed later. Better here."

The circle widened. From its heart, chains of scripture spilled downward like roots of light. At their end, the Second Custodian descended. Taller than the first. Armor thicker. Its gauntlets carried no weapons—because its arms themselves were shaped into blades of silver law. Its visor was not empty this time. Inside flickered a face of shifting light, always changing—now a saint, now a sinner, now a child, now a corpse. It was not a mask. It was memory, weaponized.

Even my demons faltered. Clarissa whispered, "That… thing wears every oath ever spoken."

Noa's tone sharpened. "Classification: Throne-Custodian Variant—Memory Host. Purpose: destroy identity anchors, force enemy into silence through despair. Warning: direct contact will erode personal will."

"Lovely," I muttered. "They brought a walking graveyard of promises."

Calem stood between us and the Custodians. His gray eyes never left me. His silver blade shone like a patient moon.

"Last chance, Neil," he said quietly. "Submit. Spare them. Spare yourself."

I grinned. My gauntlet flared rainbow-black, hungry.

"You should know by now, Calem. I don't kneel. I break knees."

The battle began again.

The first Custodian moved. Its massive gauntlet swung like a collapsing wall, aiming to crush Selena and Nana together.

"Hold!" I barked.

Nana braced. [GUARD BREAK]—her shield sang, metal against divine steel. The impact drove her feet knee-deep into the ground. Selena leapt above the strike, halberd spinning. [ABSOLUTE ZERO DOMAIN] spread like a white frost, crawling up the Custodian's arm. Ice cracked but clung. The giant lurched, slowed.

"Now!" Selena shouted. She drove the halberd deep into the joint of the arm, freezing the plates from inside.

The Second Custodian dropped beside the first, landing in a blast of dust and broken stone. Its blade-arms crossed, then spread wide, creating arcs of silver that sliced air itself. The arcs screamed, invisible but lethal.

Rena appeared in front of me, blades whirling. [HELL GATE]. Dark shields blossomed from her strikes, intercepting two arcs. The third cut past her and split a demon foot soldier in half. Blood sprayed, sizzling as it touched the glowing script on the ground.

Zereth snarled, his broken soul glowing faintly blue. He raised his staff. Chains of shadow erupted, coiling around the Custodian's legs. "It won't last long—strike now, my lord!"

I surged forward.

[BLACK MOON DRIVE]

The Void condensed around my fist, heavier than before, sharper than hunger. I slammed into the First Custodian's chest plate.

BOOOOM!

The shockwave tore stone into dust. The giant staggered back, a crack spreading down its torso.

Noa hissed inside my arm. "Integrity of Custodian shell compromised—seventeen percent. Push, My Lord!"

But Calem was there. His silver blade cut through the opening before I could follow. Sparks showered. I caught the strike with my gauntlet, but the force hurled me back across the ring. My boots carved trenches in the black stone.

Calem advanced, calm, steady.

"You're wasting strength. Even if you kill me, even if you kill them, the Choir will keep sending more."

I spat blood and smiled. "Then I'll break them all until the Choir runs out of throats."

We clashed again.

The Custodians pressed.

The First slammed its fists into the ground, creating quakes that threw demons off their feet. The Second swept its blade-arms in wide arcs, every swing carving runes of denial into the air. The runes fell like burning rain, searing armor, branding flesh.

Nana roared, raising her shield above three demons. The rain struck her instead. Her skin blistered, smoke rising, but she stood. "My Lord, they will not break through!"

Selena drove her halberd through a knight who had dared to follow the Inquisitors down. Blood and frost sprayed. She spun, halberd clanging against the Custodian's shin. "Big one's slowing! Push harder!"

Clarissa crawled across the battlefield, hands glowing red. She pressed blood sigils into wounds, freezing them shut with her cursed saliva. "Stay alive!" she screamed at a demon soldier. "Your death feeds them more than your life helps us!"

Nysha appeared in shadows behind one of the oath-palms. Her garrote snapped across his throat. He dropped, clutching at the wound, choking on silence. She vanished again.

Malrik raised both hands. [HELL MAW]. The earth yawned open under the Custodian's left foot. The giant sank, one leg trapped in molten shadow.

"Now, my lord!" Zereth howled.

I didn't hesitate.

[VOID REVERSE]

I caught the Custodian's next strike, swallowed it into Noa, then spat it back in a blast of rainbow-black fire. The explosion ripped armor from its leg, exposing bone made of scripture and light. The giant howled without a mouth.

The Second Custodian moved to cover it. Its blade-arms flashed. Rena intercepted, blades sparking against divine metal. She grunted, body trembling. "My lord! It's heavy!"

"Then we break its spine," I growled.

I surged at the Second Custodian. My gauntlet blazed. [ANNIHILATOR].

The punch landed on its chest. The Void screamed. The giant staggered but did not fall. Instead, its visor-face shifted. For one terrible second, it showed my own face—the Neil who had once been human, bleeding and broken.

My breath caught.

Noa's voice snapped in my head. "Illusion protocol—ignore. Identity anchor under assault. Hold, My Lord!"

I roared, shoving power through the gauntlet. "I'm not him anymore!"

The vision shattered. The Custodian reeled. But Calem's blade flashed through the gap, cutting across my ribs. Blood sprayed hot.

I stumbled back, clutching the wound. Pain spread, but so did rage.

"This won't end until one of us is ash," I hissed.

Calem's eyes were steady. "That is the nature of oaths."

The battle raged on.

Selena impaled one of the oath-palms, laughing as frost spread through his lungs. Nana smashed the last bell with her shield, silencing its dreadful sound. Rena dueled the Second Custodian alone, her blades moving like storms of shadow, sparks flying each time divine steel met demon silence.

Zereth coughed blood but kept his chains wrapped around the First Custodian, holding it still while I hammered cracks deeper into its chest.

Noa's voice pulsed harder now. "Crown integrity: fifty-nine percent. Energy expenditure unsustainable. My Lord, if you wish to end this, use the Genesis Chamber fully."

I paused, panting. "And the cost?"

"Half your soul. At least."

I smirked. "Then it's a fair trade."

But before I could answer, Calem lunged. His silver blade cut straight for my throat.

Instinct roared. My gauntlet rose. [BLACK MOON PIN]. A nail of darkness shot from the Crown, piercing his ankle, locking him mid-stride. His blade stopped an inch from my skin.

I twisted, slamming my fist into his chest. BOOOM! He flew back, crashing into the rubble, coughing blood. His sword still shone, but dimmer now.

The First Custodian cracked down the middle under Selena and Nana's combined assault. It toppled, collapsing in a storm of broken law.

But the Second still stood. Its face shifted faster now—hundreds of expressions, hundreds of lives. It raised both blade-arms, crossing them over its chest. The air itself bent.

Noa gasped. "My Lord—it's preparing a Terminal Invocation. If it completes, everything in this radius will be erased from the ledger of existence. Nothing left."

I spat blood and grinned. "Then we don't let it finish."

I turned to my demons. "All of you. With me."

They answered as one. "Yes, my lord!"

We surged.

Selena's halberd froze the Custodian's knees. Nana's shield smashed into its ribs with a sound like breaking bells. Rena leapt high, her twin blades carving X-shaped shadows across its visor. Zereth's chains lashed its arms, dragging them wide. Clarissa painted blood across its wounds, forcing them to stay open. Nysha appeared behind it, cutting glowing veins. Malrik's Hell Maw swallowed its feet again.

And I—

I opened Noa fully.

[GENESIS CHAMBER—FULL UNLEASH]

Rainbow-black light erupted from my gauntlet. The air screamed. The ground split. My body felt like it was burning from inside out, but I didn't stop. The Void swallowed the Custodian's invocation, tearing the runes apart before they could solidify.

Then I drove my fist straight through its chest.

The visor shattered. The shifting faces screamed once, then went silent forever. The Second Custodian collapsed like a falling mountain, crashing into the Black Spire's base. The shockwave ripped stone into dust, throwing even Calem to his knees.

The battlefield stilled.

Ash fell like snow. Blood steamed. My demons stood panting, broken but alive.

Noa whispered inside me, voice faint. "Crown integrity… thirty percent. Soul integrity… unstable. My Lord, you are still standing. Remarkable."

I coughed blood, grinning weakly. "Told you. Thirty-nine percent is enough."

Calem rose slowly, his blade dim, his armor cracked. He looked at the fallen Custodians, then back at me. For the first time, his expression faltered.

"This is not over," he said quietly. "The Choir will not forgive this."

I staggered forward, lifting Noa, sparks dripping from the gauntlet like blood. "Then tell your Choir… Hell is waiting."

The demons roared behind me, their voices shaking the broken Spire.

And in the silence that followed, the circle above flickered, then closed—cutting off the light, leaving us in the heavy dark of victory.