The battlefield was in ruins. The air crackled with tension as Raja stood before the Demon King, Muzan Kibutsuji, the strongest demon to have ever existed. The moon cast an eerie glow on the shattered ground beneath them.
Muzan sneered. His monstrous form towered over Raja, multiple whips sprouting from his back, thighs, and arms, writhing like living serpents. His crimson eyes glowed with malice. "You dare challenge me, human?"
Raja spun his trident in his hands, the golden markings pulsing with divine energy. He cracked his neck and smirked. "Dare? No, no, no, Muzan. I planned this." He pointed his trident at the demon. "Time for some pest control."
Muzan's eyes twitched in irritation. He had fought countless Demon Slayers over the centuries, but none had ever stood before him so… casually.
Without warning, Muzan's whips lashed forward, aiming to rip Raja to shreds.
But Raja? He vanished.
"God Breathing: Obscuring Clouds!"
A mist engulfed the battlefield, and Raja moved unpredictably—sometimes slow, sometimes impossibly fast—appearing and disappearing like a ghost.
Muzan's whips tore through the air, missing every time.
"Enough of this!" Muzan snarled. He released a shockwave energy blast from his torso, attempting to obliterate everything in front of him.
"God Breathing: Stone Skin!"
Raja spun his trident, the earth itself responding to his command. A massive stone barrier rose in front of him, absorbing the impact before shattering into dust. Raja emerged unscathed.
"Nice try, baldy," Raja teased. "But you'll have to do better."
Muzan's face contorted with rage. His body blurred as he lunged at Raja, swinging his whips like a tornado of death.
"God Breathing: Rising Dust Storm!"
Raja met him mid-air, his trident slashing through the storm of whips, creating a chaotic whirlwind of slashes. Muzan's flesh was torn apart, regenerating almost instantly—but Raja didn't stop.
"God Breathing: Thunderclap and Flash!"
With a BOOM, Raja disappeared, moving faster than lightning itself. He reappeared behind Muzan, his trident slicing downward in a single devastating strike.
SLASH!
Muzan's arm flew off, disintegrating mid-air.
The Demon King stumbled, his breathing ragged. "What… is this… power?"
Raja twirled his trident. "Oh, you haven't even seen my favorite part yet."
Muzan roared, his whips transforming into massive, fanged mouths that lunged at Raja, trying to devour him whole.
"God Breathing: Roar!"
Raja slammed his trident into the ground, unleashing a sonic explosion that shattered the demon's attack. Muzan was blasted backward, crashing through a mountain of rubble.
For the first time in centuries… Muzan felt something unfamiliar.
Fear.
Raja casually cracked his knuckles. "Ready for round two?"
Muzan stood up, his body still regenerating at an inhuman pace. But there was something wrong.
He clenched his fists, feeling his cells struggling to repair themselves.
Then it hit him—
The virus.
Genya's bullet.
His Slime Flesh Escape technique was disabled.
Raja saw the realization dawn on Muzan's face and grinned. "Yeah, you're not running away this time, you overgrown leech."
Muzan snarled. "I AM MUZAN KIBUTSUJI! I WILL NOT DIE!"
Raja rolled his eyes. "Cool story. Try this on for size."
"God Breathing: Sun Fire Thrust!"
His trident ignited with flames as bright as the sun itself, and Raja thrust it forward. Muzan barely had time to react before—
BOOM!
The fire blast engulfed him, scorching his flesh beyond regeneration. Muzan screamed in agony, his body melting under the divine flames.
"You BASTARD!" Muzan screeched, his whips flailing wildly.
Raja dodged effortlessly, his movements fluid and unpredictable.
"God Breathing: Slithering Serpent!"
Raja twisted through Muzan's attacks like a snake, darting between the whips, closing the distance with blinding speed.
"God Breathing: Flower Petals!"
A flurry of precise thrusts rained upon Muzan, piercing his hearts one by one.
Muzan coughed up black blood, staggering.
"No… NO! I AM IMMORTAL!"
Raja sighed. "Dude, you've said that like, four times already. Let's wrap this up."
Muzan's eyes widened as Raja raised his trident above his head.
The air itself trembled.
Raja's final attack was coming.
"God's Rage."
Fire. Water. Wind. Earth. Thunder. Mist. Sound. Beast. Serpent. Flower.
Every element fused together.
The sky darkened as the ground cracked apart.
Muzan's instincts screamed at him to flee.
But he couldn't move.
Raja thrust his trident downward—
"DIE, MUZAN!"
A cataclysmic explosion erupted.
BOOOOOOOOM!
The impact shattered the battlefield, leveling mountains and tearing apart the very fabric of space.
When the dust settled…
Muzan lay broken.
His body was mutilated, unable to regenerate.
And worst of all—
Raja's trident was lodged in his skull.
Muzan could not move.
His eyes flickered in horror. "No… this… is impossible…"
Raja exhaled, wiping sweat from his brow. "Whew. That was fun."
He snapped his fingers.
SHWOOOOM!
Every Demon Slayer was teleported to his location.
Tengen whistled. "Damn. That is one messed-up corpse."
Zenitsu peeked from behind Tanjiro. "I-Is he actually dead?"
"No," Raja said. "But he will be."
He pointed at the horizon.
The sun was rising.
Muzan's face twisted in sheer terror. "NOOOO! I CAN'T DIE LIKE THIS!"
Raja smirked. "And now for the special guests…"
He teleported his father and mother to the battlefield.
Raja's father Kagaya Ubuyashiki crossed his arms, nodding approvingly. "Good job, son. You beat him senseless."
His mother Amane Ubuyashiki sighed. "Raja, honey, did you have to break everything?"
Muzan let out one final scream—
The first rays of sunlight touched his skin.
And then—
His body began to disintegrate.
The Demon King's reign…
Was finally over.
🔥 TO BE CONTINUED… 🔥