Somewhere in the mountains, hidden between jagged cliffs and sheer insanity, Raja's ultimate fortress stood tall and mighty. It wasn't just a fortress—it was a monument to pettiness, designed for the sole purpose of trolling Muzan Kibutsuji before his inevitable demise.
A massive stone maze stretched out for miles, lined with magic traps, illusory dead ends, and signs that only got more ridiculous the deeper one ventured in.
At the entrance, a large wooden sign read:
🚫 "No Demons Allowed – By Order of the Little Lord." 🚫
In smaller text below:
"Violators will be severely disappointed and publicly humiliated."
The King of Demons, Muzan Kibutsuji, stood at the edge of the fortress, staring at the absolute nonsense in front of him. His plum-red eyes twitched as he scanned the unholy combination of medieval castle, ancient labyrinth, and kindergarten humor.
"What… in the accursed name of Yoriichi is this?"
Muzan, in all his glorious villainy, expected a dramatic entrance. A fateful clash. Maybe some dramatic chanting in the background.
Instead?
He got a glorified theme park designed to annoy him.
The Shadow Ninja guards, positioned at every corner, simply stared at him with smug satisfaction, not moving—as if they had already won.
Muzan took a deep breath.
No, Kibutsuji Muzan does NOT get angry at walls.
He entered the fortress, gliding through the labyrinth like a final boss—only to stop every five minutes to read the taunting signs left behind.
🪧 "Did you seriously think it'd be that easy? 😂"
🪧 "Turn back now, Muzan. Your mom says dinner is ready."
🪧 "If you're still reading this, I'm billing you for the entertainment. – Raja"
After twenty minutes of suffering, Muzan finally reached the center of the fortress—a grand open-air chamber, lined with Hashira, all staring at him with the kind of bloodlust that makes demons nervous.
At the center of the arena, sitting casually on a throne, was Raja.
A glass tube containing a Blue Spider Lily twirled in his fingers as he leaned back, looking as smug as humanly possible.
Behind him?
An entire garden of Blue Spider Lilies, gently swaying in the night breeze.
Muzan stared in utter disbelief.
"You… You dare…"
Raja raised an eyebrow, taking a dramatic sip from an empty goblet just to annoy him further.
"Oh? What's wrong, Michael Jackson? Lost for words?"
The Hashira chuckled, and Muzan's plum-red eyes flickered with rage.
Just as Muzan was about to deliver his villainous monologue, Tamayo-san stepped out from behind Raja, gracefully grabbing the tube from his hand.
Muzan's face contorted in sheer betrayal.
"Tamayo… YOU!"
Before he could process this unforgivable insult, Muzan suddenly felt a burning sensation at the back of his head.
BANG!
Genya, the stealthiest, most unhinged ghost boy, materialized from the shadows, holding his modified Desert Eagle with a smug grin.
"Surprise, motherfu—"
Muzan staggered forward, clutching his head as the virus-infused bullet burrowed into his cells.
His body convulsed, his flesh writhing unnaturally.
The entire fortress watched in complete silence as Muzan Kibutsuji, the most feared demon in existence, fell to his knees.
For the first time in centuries, Muzan felt… pain.
And he did not like it.
"W-What is this?!" Muzan hissed, his voice laced with pure, unfiltered hatred.
Raja grinned.
"Oh, nothing much. Just a little something from Tamayo—her own personal 'anti-Muzan' virus."
The Hashira smirked, watching Muzan clutch his head in agony.
Gyomei wiped a single tear. "Truly, divine justice."
Sanemi laughed. "Damn, I wish I had recorded that!"
Muzan stood up, his body still reeling from the virus, but his aura intensified—deadlier than before.
"You will all pay for this."
Raja yawned.
"Yeah, yeah, sure. Anyway… ATTACK!"
The moment the Hashira lunged—
A massive door suddenly appeared under them.
And just like that—
The Infinity Castle swallowed them whole.
Muzan vanished into the darkness, and the entire Demon Slayer army was scattered across the castle, each facing their greatest enemy.
With a single snap of his fingers, Raja activated his divine sense, locking onto every demon in the castle.
Then, with another snap—
Everyone was instantly teleported to their destined fights.
⚔️ The Match-Ups Are Set!
Upper Moon 1 – Kokushibo vs. Gyomei & Muichiro
Upper Moon 2 – Doma vs. Rengoku & Inosuke
Upper Moon 3 – Akaza vs. Giyu & Sanemi
Upper Moon 4 – Nakime vs. Kanae & Mitsuri
Upper Moon 5 – Hantengu vs. Obanai & Tanjiro
Upper Moon 6 – Gyokko vs. Tengen
Upper Moon 7 – Kaigaku vs. Zenitsu
1000-Monster Horde – Shinobu, Genya, Kanao & Shadow Ninjas
Each fighter stood face-to-face with their opponent, their weapons gleaming under the eerie glow of the Infinity Castle.
And in the center of it all—
Raja and Muzan stood alone.
Muzan's eyes burned with hatred.
"You have meddled for the last time, human."
Raja simply cracked his knuckles.
"Nah, I'm just getting started, Mikey."
And with that—
The battle for the fate of the world was about to begin.
🔥 To Be Continued…