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"Holy shit!!!"
"What the hell?!"
"They're starting the final battle?!"
As the Infinite Castle suddenly rose from the ground, countless beings across the multiverse stared, eyes wide in horror.
"So that's why the broadcast hasn't stopped… The next war between the Demon Slayers and the demons—it's about to begin!"— Admiral Tsuru of the Navy finally pieced it together.
"Didn't expect it to start this suddenly… Let's hope it ends well."— The Fifth Hokage, Tsunade, spoke gravely.
"No worries. Every Hashira and Tanjiro's group have awakened their full sets—mark, red blade, and transparent world. Their strength is on a whole new level!"— Kyojuro Rengoku's counterpart in another world grinned confidently.
"But… the demons are also at full strength. This time, it's an all-out war."— Armin from the world of Titans frowned deeply.
"The biggest problem is Muzan. In the original timeline, even when he was weakened to ten percent, he still crushed them. If not for sunrise, they never would've won. Now he's in peak form… That's bad news."— Rimuru Tempest shook his head, far from optimistic.
"The only wild cards left are those two weird-looking outsiders. Let's hope they pull off something crazy."— Gildarts from Fairy Tail muttered under his breath.
All eyes from all worlds locked on the final battle of Demon Slayer.
At the Demon Slayer Corps headquarters, the slayers watched the sudden appearance of the demon army in shock.Then—after a heartbeat—their fear turned into burning resolve.
"Perfect. You came to us, demons. This time we're wiping you out for good!"— The hotheaded Wind Hashira, Sanemi Shinazugawa, growled coldly.
"That's our line, don't you think? You won't be so lucky this time, slayers."— Daki's brother, Gyutaro of the Upper Six, sneered.
This time, his sister wasn't with him.Daki had been hidden deep within the Infinite Castle—making Gyutaro effectively immortal.
Likewise, Hantengu's main body was also hiding inside, leaving his clone Zohakuten to fight in his stead.
"Mmmph! Mmmph!"— Gyokko whimpered through a sealed mouth, then transformed into his grotesque second form.
No need for more words.Enemies locked eyes. Rage boiled over.
"Muzan!!!"
The nine Hashira and Tanjiro's group roared in unison, marks blazing and red blades flashing, as they charged toward the Infinite Castle.
"Go," Muzan said coldly.
At his command, the demon horde surged forth.
But…
Against the awakened Hashira with their marks and red blades, ordinary demons—or even the Lower Moons—were nothing.A single swing carved through dozens.
"Hashira, leave the small fry to us!"— Murata and the other lower-ranked slayers stepped forward, taking over the crowd battle while the Hashira advanced toward the Upper Moons.
"Let's go!!!"— Gyutaro lunged first—only for Sound Hashira Tengen Uzui to flash in front of him.
Slash!
Gyutaro's head flew off.
And thanks to the burning power of the red blade, it couldn't regenerate.
That was the sheer difference now—the "Threefold Awakened" Hashira were on another level entirely.
If not for Zohakuten's wooden dragons blocking the follow-up strikes, Gyutaro would've been reduced to ash then and there.
On another front, Gyokko fared no better—Muichiro, the Mist Hashira, had once killed him without these new powers. Now, with all three awakenings?Gyokko barely survived the first exchange—saved at the last second by Upper Two, Doma.
"Blood Demon Art: Crystal Lotus Bodhisattva!"Doma smiled, summoning an enormous ice statue that towered over the battlefield.
"Gyutaro, Gyokko—you two can't take them head-on anymore. Play support from the side."He grinned pleasantly, his tone mocking."And Akaza, my dear friend—your Compass is useless against the Transparent World now, so maybe watch yourself, hmm?"
"Shut your damn mouth!!!"Akaza snarled, his severed neck reattaching as he glared.
He already knew.
Just moments ago, he'd clashed with the Flame Hashira, Rengoku.And nearly lost—instantly.
The Transparent World completely countered his fighting sense.The only saving grace was that the Hashira couldn't maintain that state for long.
The battle descended into chaos.
"This isn't looking good. After losing last time, the demons are fighting smarter—and cooperating. That's a serious problem."— Reborn from Hitman Reborn! frowned.
"Yeah. One-on-one, none of the Upper Moons except Doma and Kokushibo can stand against a Threefold Hashira. But now they're actually teaming up."— Bai Yue Kui from Ling Cage shook her head.
"Especially that Zohakuten's wood dragons and Doma's ice constructs—they're throwing the slayers off completely."— Cao Yan Bing from Rakshasa Street muttered grimly.
"If this drags out, it'll be bad for the slayers. Humans get tired. They bleed. They don't heal instantly."— Gai Nie from Qin's Moon clenched his wooden sword.
"And Muzan… he's not some proud fool. He'll cheat, hide, strike from behind—whatever it takes to win."— Zhang Chulan from The Outcast said quietly.
BOOM!
A thunderous blast of white lightning tore across the battlefield.
Seeing his forces struggle, Muzan finally made his move.
While Tanjiro and the Hashira were locked in combat with the Upper Moons, he struck without warning.
The white thunder exploded among them—sending bodies flying, blood spraying through the air.
Just like that, the tide turned.
Against the uninjured, fully powered Demon King, even the Hashira's Threefold Awakening wasn't enough.
"That… that's the outside help they mentioned?"— Zohakuten sneered as he manipulated a wooden dragon to snatch up the sleeping Cosmog.
"Cosmooo!"
Mitsuri Kanroji, the Love Hashira—her reflexes unmatched—slashed the dragon apart and caught the tiny Pokémon in her arms.
But she forgot one thing.
After evolving, Cosmog's weight exceeded a ton.
The sudden heaviness knocked her off balance; her sword slipped from her grasp.
"Hmph."Zohakuten smirked and sent more wooden dragons to crush her.
Iguro, Tanjiro, and the others tried to rush to her aid—but they were too far, too exhausted.
"I'm sorry, everyone!!!"Mitsuri hugged Cosmog tight, closed her eyes, and braced herself for the end.
BOOM!
The dragons slammed down—
Then exploded.
A blinding light erupted from within.
During its slumber, Cosmog had been absorbing energy—both from Nichirin Blades and the Golden Axe's light.Now, it was complete.
The tiny nebula evolved—into the God of the Sun, Solgaleo!!!
"Is that… the sun?"Escanor murmured, muscles swelling as the radiant light filled the dark battlefield.
"..."
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