"Domain Expansion: Coffin of the Iron Mountain!"
With the instantaneous eruption of boundless cursed energy, everyone was swallowed by an all-encompassing darkness.
A scorching, enclosed space—its ground layered with thick, gray-brown rock.
From the cracks in the surrounding stone, molten lava spurted out, heat constantly rising.
The terrain shifted in an instant…
Just as Ijichi and Fushiguro had barely calmed themselves, their nerves tightened again.
A domain's guaranteed-hit effect, combined with environmental advantage—
This was the pinnacle of cursed techniques that sorcerers pursued their entire lives.
They never expected that this unknown Special Grade cursed spirit would possess such a divine technique.
"Hey, mama's boy—do you think your 'backer' can handle this?"
Kugisaki walked over to White Zetsu and whispered.
"If things go bad, we should all jump in together!"
Her grip on the hammer tightened so much her knuckles turned white.
She didn't want Mirai to face such a terrifying existence alone—
nor did she want to be reduced to a "burden" in the curse's eyes.
"Hey, delinquent—"
White Zetsu had barely started boasting when he was suddenly interrupted.
"Kugisaki Nobara, right?"
Mirai turned around, smiling gently.
"Y-yes, that's me."
She responded instinctively.
"I'm not familiar with your technique, so I won't be able to guide you individually today."
"I-it's okay."
She had only just enrolled today, and it was her first time meeting White Zetsu.
Looking at the young teacher—who didn't seem much older than her—Kugisaki's ears turned slightly red.
Mirai's calm demeanor gradually eased everyone's tension.
If he already understood her technique, that would've been strange.
Standing atop a living volcano formed from condensed cursed energy, Jogo curled his lips into a sinister grin.
No matter how strange that technique was—
once inside his domain, everything was already decided!
"Brat, go repent in hell!"
As his words fell—
Hundreds, thousands of blazing pillars of fire shot toward Mirai from all directions!
Even Itadori and the others behind him felt suffocated by the overwhelming heat.
For Mirai, the greatest gain from half a year of studying barrier techniques
was the further development of his mental domain—
A deeper control over the core of cursed energy.
Because of this, even without activating the Sharingan earlier, he could still turn intangible.
He could even stand within shadows while facing attacks that covered his entire body.
In another world…
Beyond copying techniques and possessing dynamic vision—
Genjutsu was the Sharingan's most lethal weapon.
Until mastering Domain Expansion, Mirai had never fully unlocked this terrifying ability.
Now—
His deep black eyes suddenly glowed with a horrifying crimson light!
Raising one hand before his chest, two fingers together—
"Domain Expansion: Final Scene — Glazed Moon."
The moment his words fell—
The surging waves of heat came to a sudden halt, and the entire volcanic domain trembled violently as if the world itself were collapsing!
Crack—crack, crack!
Crisp shattering sounds rang out as the oppressive scenery in Itadori and the others' eyes changed instantly.
Darkness.
An endless, sealed world where nothing could be seen.
The next second—
Ripples of blood-red light spread outward.
Everyone looked up.
Suspended high above was a glass-like moon, shimmering with multicolored points of light.
A dreamlike, dazzling sight—unlike anything seen in reality.
Nine blood-red tomoe adorned the moon's surface, adding a deadly aura to its beauty.
"W-what is this…?"
Still clueless about what a domain truly was, Itadori could barely comprehend the earlier volcano—
But this surreal, radiant moon in the sky left him dazed.
"Domain Expansion…"
Under the red moon, Mirai spoke calmly:
"With immense cursed energy as the foundation, you construct an innate domain imbued with your technique."
"To put it simply…"
"You materialize the scene in your mind with cursed energy—turning imagination into reality."
"Imagination… into reality…"
Itadori muttered, half-understanding.
"Sensei—Volcano Head is here!"
Kugisaki's loud voice instantly drew everyone's attention.
"Huh?"
Looking at the Special Grade cursed spirit standing beside Kugisaki—with a smug expression—everyone was confused again.
This was their teacher's domain…
So why did the curse still look so confident?
Walking up to Kugisaki, Mirai explained with a light smile:
"My domain's effect…"
"Any being with cursed energy that enters it will automatically sink into an illusion."
"They'll be trapped in the world created by their own mind—unable to escape."
As Mirai explained—
White Zetsu swaggered over to Jogo.
"Watch closely, boys!"
Smack!
He slapped Jogo hard across his volcanic face!
"Simply put—this guy can't perceive anything in reality anymore."
Damn—his skin is tough!
White Zetsu forced a grin, then stuffed his hands into his pockets and rubbed them repeatedly.
Everyone silently watched him, the corners of their mouths twitching—
pretending they hadn't heard anything.
That crisp cracking sound just now…
was way too loud.
"Oh!"
Itadori nodded excitedly.
"Sensei, I get it!"
"So what Volcano Head sees isn't the same as what we see, right?"
"What nonsense are you spouting?!"
Kugisaki shot him a glare.
"You're just repeating what Sensei said and acting like you're smart!"
A good man doesn't argue with women.
Itadori glanced at her, then quietly retreated back beside Fushiguro.
"He's probably immersed in the illusion where he's already defeated Sensei."
"That's why he looks like that."
Having regained his composure, Fushiguro spoke calmly.
As an assistant supervisor, Ijichi instinctively began analyzing the domain's properties.
No wonder it was called Final Scene…
Immersed in a fabricated world, unable to perceive reality—
Which meant that the moment the domain was activated,
the last scene the enemy saw in reality became their final "truth."
"Mirai-sensei… does that mean what we're seeing right now is also an illusion?"
Ijichi asked cautiously.
Mirai nodded.
"That's right."
"Any being with cursed energy that steps within the moonlight will fall into illusion."
"Sensei, I—"
Itadori raised his hand to speak but was interrupted again.
"Itadori-kun."
Ijichi pushed up his glasses, expression serious.
"Save it until we return to reality."
"Domain Expansion is an extremely cursed-energy-intensive technique."
"Got it!"
Itadori immediately shut his mouth and stood still.
"Then… see you back in reality."
As Mirai spoke—
The scenery before their eyes shifted rapidly.
The sound of shattering glass echoed as countless fragments scattered.
Each shard shimmered with dazzling colors, reflecting strange, fragmented scenes.
Drip… drip…
"What… is going on?"
Jogo's weak voice pulled everyone back to reality.
The mountain path was the same as before—
the ground scorched and full of craters.
And there stood Mirai-sensei, calm as ever—
Alongside a Special Grade cursed spirit… with only half its head remaining.