JJK: I am the real villain

The air went still, Zankei Kubigari's face twisting into a maniac grin, his full set of teeth coming to a full display.

Nanami and Mahito had their eyes in disbelief.

"Guh!!"

Nervous grunts filled the air as Yuji Itadori rose up on his feet. Zankei Kubigari standing still, his confidence on display.

Tattoo marks appeared on Itadori's face, his hair standing up, another smaller set of eyes grotesque-like opened beneath his eyes.

Itadori's face changed vastly, his expression turning into a scowl.

"You've been trying to get an illicit reaction from me, haven't you..?"

The voice dropped like an echo of judgement, Itadori turning his head slowly at Zankei Kubigari.

"And you bought it, gracing me with your presence. King of Curses.

Ryomen Sukuna..."

Sukuna, the entity inside of his vessel, Yuji Itadori, smiled, his intentions poisonous.

"I wouldn't say that... I thought for a measly insect to claim such blasphemy against me is just unforgivable...

I decided to come give you a chance on why the eyes, praises, and attention should be thrown at you."

Zankei was unfazed, despite Sukuna's aura and depressing but vigorous cursed energy with malevolent aura.

"My intentions on why I wanted you to take over is completely mine to worry about, so don't ask. Secondly, I've been proven wrong on the modern era of sorcery being weak...

Are you aware of that, Sukuna?"

Sukuna stared at him with a mocking but deadpan gaze, a small smirk on his lips.

"So your conclusion meaning they're strong? Ha! What a joke. This era is disgustingly weak but interesting, very interesting...

But that is only given to certain individuals I could name."

"Perhaps a blindfolded man?" Zankei asked vaguely.

Sukuna responded with a large grin, his face distorted past normal human proportions.

"I see you've met him..." Sukuna laughed loud, tearing his shirt off. "I'll be serving him a cold cup of death when I'm fully back at strength."

"I guess we have something in common..."

"What are you talking about... You insect? We are nothing alike."

"Not at full strength, have a shared goal of cutting down the strongest of this era and anyone else who has been enlightened."

Sukuna responded with a smile, bringing his hand over his hair. "What are you? Asking me to join you? Forget about it."

"Not what I'm here for, just a brief spar." Zankei said, spreading his feet on the ground, taking a stance.

Sukuna's face turned disdainful.

"How far have insects come to challenge something above their comprehension," Sukuna said with annoyance in his tone.

But regardless, he readied himself, bringing his hands together.

Nanami had tied himself, stopping the bleeding by a bit, making his way out of the scene. Mahito stood with excitement and intrigue, examining both Sukuna and Zankei's souls.

The schoolyard went silent, the curtain draping the schoolyard dropping in an instant.

Mahito jumped back, watching from a rooftop, his eyes keen with focus on the two ancient entities.

"I don't think I'll need to take you too seriously, you insect." Sukuna used Zankei's word for degrading those beneath him.

Crash!!!

The school building came crumbling down, the ground gaping with debris and rubble all over with dust particles covering the atmosphere.

Mahito's expression changed, surprise and disbelief on his face.

"All that from just a clash?"

The scene cuts back to Zankei and Sukuna exchanging hands with each other, their swings faster than a normal eye could see.

Zankei hit Sukuna with his elbow to his neck, twisting like a natural prodigy, transitioning into a hit into his ribs.

Sukuna's grin disappeared, focus in his eyes. He was launched, crashing into the suburban streets, many cars going off in their alarm.

Zankei gave chase, closing the distance as Sukuna recovered slowly.

"Guh!" Sukuna grunted.

Zankei landed a crushing hit into his abdomen, launching him once more through a house.

"What, who is this kid?" a man yelled in terror as he saw Sukuna in Itadori's form, his wife clenching a pillow from the sudden crash into their home.

Sukuna clicked his tongue, dismissing them. He saw Zankei walking up slowly to him.

Sukuna quickly grabbed the man, cutting his body into several pieces, hurling them at Zankei, the man's wife screaming in terror.

Zankei kicked the flying limbs at him, Sukuna appeared before, his leg cocked for a devastating hit.

But Zankei reacted, grabbing Sukuna's leg while he was in the air.

Sukuna guarded his head as Zankei landed a punch, breaking his arms on impact.

He was sent flying, before coming to a stop, Zankei stood behind him, his hands buried in his sleeves with a calm look on his face.

Sukuna twisted with an air-piercing punch at Zankei. Zankei caught the hit with his palm.

Sukuna went in for a sequence of more precise hand-to-hand combat, but to his annoyance, Zankei deflected with redirecting and using his arms like whips tearing the air.

Sukuna went in for a cutting right hook, Zankei with a swift motion caught it with his arm, keeping it in between his biceps.

"THUD!!"

Zankei delivered a shocking elbow into Sukuna's jaw, dislocating his jaw joints.

But no matter, Sukuna smiled, his eyes calculating calmly.

SLICE!!

Zankei's face, hands were cut. His flesh and bones showing how devastating the cuts were.

Zankei let go of Sukuna, the King of Curses chuckling like a maniac before saying,

"I can't think of fighting and winning against you in a hand-to-hand combat sequence...

But with that said, there are other ways to dispose of insects like you."

Sukuna's teeth came into full display, Zankei's eyes going wide.

This... This is his trump card right now. He has no other resources due to his weakened state, Kenjaku mentioned as of now, he's about 6 to 7 of his fingers in strength, a bit relative to Jogo.

He knows he can't beat me in head-on combat, this gathering of cursed energy... He's definitely going to use it.

The environment was quickly covered, the ending of it being out of sight and reach.

A separate space manifesting the mindscape of a sorcerer.

"Ryōiki Tenkai: Malevolent Shrine."

The words dropped like an unexpected damnation.

In 0.001 seconds, Zankei Kubigari employed simple domain, covering himself in a small radius of an inactive domain of his own with none of cursed technique.

Sukuna raised an eyebrow of mockery as he stood at the top of a grotesque-looking shrine, clasping his hands in a sign. Multiple bones and the ringing of a bell resounded in the background.

This is it? I suppose slashing attacks? I wouldn't want to find out.

Zankei thought to himself before making a quick decision.

In an instant, Sukuna's eyes went wide, his mind unable to fathom the comprehension of what Zankei just did.

Zankei's simple domain buzzed with life, expanding faster at a considerable rate, covering both him and Sukuna.

"What did you just do? Did you just expand a simple domain?" Sukuna asked in shock, his voice painted in disbelief.

Zankei smiled before explaining.

"Nothing much, just a binding vow stating that I won't be able to use my technique in exchange for expanding my range of my simple domain.

As you can see, a simple domain is comparable to that of a spacesuit, it can protect from the harsh environment temporarily. Furthermore, I've been versed with the creation and speed of barriers, giving me the data necessary to create a growing simple domain whilst enduring an attack simultaneously.

This technique in particular has other things related to the binding vow I won't be disclosing, so if you try to imitate this, you'd have a hard time."

Sukuna had a look of disdain on his face, clicking his tongue.

"And in this version of simple domain barrier, it takes a generous amount of CE, but nothing draining for the likes of me."

Zankei placed his feet on the ground, covering the small distance in an instant, Sukuna snapping his neck, looking for him.

"And I don't need to use my technique because I could just overwhelm you using brute force..."

Mahito from the outside looked on as Sukuna had expanded his domain earlier, but after a mere 10 seconds, it crumbled to the ground.

"What? Impossible!!" Mahito gasped in surprise.

"... inevitably crumbling your domain."

The barrier of Sukuna's domain shattered like glass, Sukuna hitting the ground, his body battered and bruised with wounds on his body.

Zankei stood before him, his hands tucked in his yukata sleeves.

"You've proven to be quite the nuisance, more annoying than that blindfolded brat."

Sukuna muttered, standing up on his feet, healing up his body. His face morphing into something beastly, anger and hate drenching from his voice.

"I've changed my mind. When I get my full strength back, I'll be chopping you up first and have you for supper!!!"

Zankei stood unfazed as Sukuna's tattoo marks started to fade off slowly.

"I swear it, I'll have your heart grinding against my teeth!!" Sukuna's hate was in full display.

"Well, I have been fond of eating cursed spirits for supper as well... I've never tasted what a human spread with a cursed corpse like you tastes like." Zankei said with a straight face.

"It'll be an honor to die by your hand, Ryomen Sukuna... But you'll have me when you've earned me. With that said, you aren't out of my menu as well, King of Curses."

Mahito chuckled to himself in excitement at the two crazed sorcerers threatening to eat each other after their victory in their next clash.