Harem Startup : The Demon Billionaire is on Vacation-Chapter 671: A Decimal

Chapter 671 – A Decimal

The Overlord’s inner sanctum was unravelling, slowly, violently. Sigils blinked out one by one. Chunks of floating glyph-armor shattered under Lux’s assault. Smoke curled upward in thick, oily streams as black ichor sizzled and ran down collapsing walls. The air stank of old curses and burnt parchment. The core pulsed, bloody and frantic, like a heart on the edge of arrest.

Lux ran straight toward it, boots slamming across fractured voidstone. His body moved on instinct, not calculation. Because this wasn’t a duel anymore.

It was a damn audit.

He spun low to avoid a lance of red light, teleported to the left as the Overlord’s cloak lashed out like a blade, and hurled a demonic orb that detonated in a sharp flash, scattering defensive glyphs. His breath came ragged. His limbs burned. But his grin only widened.

"Too slow!" he shouted, leaping into the air, wings flaring out behind him.

He raised the Greed dagger, twisting his wrist mid-flight to target the exposed core. Runes swirled around his body like currency mid-collapse.

The Overlord reacted.

Fast.

Desperate.

With a scream that tore through dimensions, the entire chamber slammed inward.

[System Alert: Void Spike Activated – Full Power Rebound]

The walls compressed. Air detonated. And from the spiral of the abyss rose a spike. Black. Glistening.

It struck Lux in the side, hard.

So hard, he didn’t even register the impact right away.

It lifted him from the air and threw him. Not back. Not aside.

Down.

Straight into the broken platform below, where he smashed into a wall, bounced, and rolled.

The sound was awful. Bones. Glass. Metal.

Everything all at once.

He hit the voidstone again, hard enough to crack it.

He didn’t move.

For a second, the Overlord stood taller.

Its cloak reknit.

Its shattered rib symbols glowed again.

"Vaelthorn," it rumbled, voice layered and grinding. "You are a child. A decimal. A glitch. This realm is mine. You will default."

Silence.

Then a cough.

Lux rolled onto his side, spitting blood. It splattered across the glowing floor and hissed like acid.

He laughed.

A short, breathless, insane laugh.

His left eye was bruised. His shoulder was dislocated. And the entire right side of his jacket had been shredded. He pressed one hand to his ribs, felt the crack.

But his smile didn’t fade.

"You finally hit something," he rasped. "About time."

[System Warning: HP Reduced – 52% Remaining]

[Physical Integrity: Compromised]

[Adrenaline Surge Active – Focus Enhanced]

He hissed in pain, setting his shoulder back into place with a sickening pop and a groan. His vision spun. His wings twitched. Every nerve screamed for a break. But he didn’t listen.

Lux pushed himself up slowly, one boot braced against a burning sigil tile, his hand gripping the hilt of the Greed dagger still glowing with golden flames.

"That your best shot?" he said through clenched teeth. "Feels like a desperate dividend payout."

He used his Dark Healing skills, just so he could fight more.

The Overlord snarled, no words, just rage. It descended on him, massive form crackling with failed contracts and raw abyss energy. Runes danced around its arms. Blades made of shredded treaties spun into motion. Its shadow rose again, forming the shape of a guillotine.

Lux moved.

He didn’t leap. Didn’t dodge.

He vanished.

He reappeared midair. Ten feet from the core.

One eye swollen.

One lung burning.

But the daggers still in his grip.

The dagger that had been made not for slashing throats...

...but for piercing vaults.

He drew in a sharp breath, flicked his wrist, and summoned one more orb, just one.

It hovered by his side like a loyal pet.

Then he whispered, "Go loud."

It detonated, launching him forward like a cannonball.

And Lux plunged the Greed dagger straight into the core.

Not near it.

Not at it.

Into it.

The moment steel met the heart of the Overlord, the entire abyss screamed.

Not the Overlord.

Not the walls.

The plane itself.

Everything rippled outward in concentric waves. The core buckled. The golden energy from Lux’s dagger slithered into the cracks like an infection. Black ichor burst upward like a geyser, flooding the platform in molten curses.

Lux twisted the blade.

The cracks widened.

He held on tight, one hand wrapped around the hilt, the other gripping the edge of the fractured core for leverage as the entire structure shook beneath him.

The Overlord roared again, but this time, there was pain in it. True pain. Not strategy. Not dominance.

Wound.

"You threatened the wrong devil," Lux said, voice shaking from the strain.

The Overlord launched backward, its form unraveling again, screaming in split tongues as its defenses failed to repel the intrusion.

Lux dragged the dagger downward.

Splitting a deep groove across the core’s surface.

More ichor exploded.

More light spilled from within.

It was dying.

The Overlord’s body weakened. Parts of it folded inside out. Its robes hissed. The internal realm began to collapse, the darkness itself recoiling from the injury.

Lux looked at the dagger.

Embedded.

Embedded deep.

The light from within the core pulsed violently, flickering like a dying server.

Then he leaned close.

Blood running down his chin. Wings tattered. His smile razor-sharp.

He whispered...

"Perfect."

The cracked core pulsed with bleeding light beneath him, vibrating like a dying heart trying to hold on to something, anything, before final collapse.

Lux knelt beside the wound, one palm flat against the hot, pulsating surface. The texture was strange, like stone that had been alive too long. It throbbed under his fingers, resisting his presence even now. He could feel the Overlord trying to pull away, its awareness twitching like a cornered beast.

But it was too late.

Lux didn’t come here for a body count.

He came here to own.

With blood still dripping down his jaw, he reached slowly into his dimensional storage. His fingers brushed past emergency healing vials, high-grade explosive contracts, and then...

His fingers closed around the pen.

[Item: Infernal Ledgerbane – The Contract Pen]

It clicked once as he pulled it free.