Reborn in Jujutsu Kaisen as a Zenin

The full moon hung low over Kyoto's skyline, bathing the ancient city in silvery light. In the historical district, four figures moved silently through the shadows.

Satoru Gojo floated above the ground, his white hair gleaming in the moonlight. Beside him walked Indra Zenin, his towering frame moving with surprising grace.

Suguru Geto and Masamichi Yaga followed close behind, alert to any disturbance in the cursed energy around them.

"The curse last appeared near Kiyomizu Temple," Yaga said, checking a device that tracked cursed energy. "It spoke to three tourists before vanishing."

"It should appear again within the hour," Geto added, analyzing the pattern they had observed since arriving. "It seems to follow a schedule."

Satoru's Six Eyes scanned the area, seeing what others could not. "The energy it leaves behind is strange. It feels manufactured."

"Manufactured?" Yaga asked.

"Not natural," Satoru explained. "Like someone designed it rather than it forming on its own. Little brother noticed it too, right?"

Indra nodded. "Natural curses have chaotic energy patterns. This one's too precise."

They continued through the quiet streets, past temples and traditional houses. Most tourists and locals had stayed indoors after hearing about the strange appearances.

As they approached a small shrine, Indra stopped suddenly. His crimson aura, invisible to normal eyes, responded to something only he could sense.

"It's here," he said.

The others prepared for combat, though nothing was visible yet. Satoru focused on an empty space near the shrine entrance.

"Interesting," he said. "It exists partly in another dimension. That's how it's been avoiding detection."

The air began to twist and fold, creating a spiral from which a figure emerged. Though humanoid in shape, it was clearly not human.

Its body looked like overlapping armor plates, with a face too symmetrical to be natural.

The Special Grade curse stood taller than a human, its body distorting the space around it. Most striking was the spiral pattern in what seemed to be its eye - the center of its dimensional powers.

"The Sons of Heaven arrive," the curse said, its voice echoing unnaturally.

"And who might you be?" Geto asked, ready to capture it if possible.

The curse ignored him, focusing only on Indra and Satoru. "The First Son of Heaven returns. The Second and Third herald his awakening. The world will burn anew."

"You've been busy spreading that message," Satoru remarked, rising higher for a better view. "Care to explain why?"

"I am Kamui," the curse stated simply.

Without warning, its body began to distort, the spiral expanding outward. Yaga tried to contain it with a barrier, but his energy passed through the curse as if it weren't there. 

"It's shifting between dimensions," Satoru observed, tracking its movement. "Normal techniques won't work."

When Kamui reappeared, it was several meters away. "The Observer sees much, but not all," it said to Satoru. "Your Six Eyes cannot see between dimensions."

Indra's crimson aura became faintly visible as his interest grew. "This one is mine," he stated firmly.

Satoru raised an eyebrow. "Going solo, little brother? This should be interesting - a dimensional shifter against your technique."

"Zenin-san," Yaga began, concerned, "we should work together-"

"Secure the area," Indra cut him off. "Keep civilians away. I will handle this."

The authority in his voice left no room for argument. Yaga and Geto exchanged glances before moving to create a safety perimeter around the shrine.

Satoru merely grinned and settled into a comfortable position in the air. "Don't mind me," he called. "I just want to see how you handle another absolute defense."

Kamui's spiral eye spun rapidly, and suddenly its arm shot toward Indra with impossible speed. Rather than a direct attack, the limb passed through space itself, emerging from a small distortion right beside Indra's head.

With extraordinary reflexes, Indra barely dodged the attack. His crimson aura flared, trying to catch the curse's arm before it could retreat.

But Kamui's limb simply phased through the energy, becoming intangible before disappearing back into its dimensional pocket.

"You cannot touch what exists between spaces," Kamui stated confidently.

"Is that so?" Indra replied, his voice dangerous. His crimson aura suddenly intensified, expanding into a perfect sphere around him.

The air grew heavy as Indra's power manifested more fully than it had in years. The crimson energy didn't just surround him - it changed the very nature of the space it occupied.

When Kamui's next attack emerged from a spatial pocket near Indra's shoulder, the limb didn't pass through the crimson aura.

Instead, it hit the energy solidly, as if its ability to phase had been neutralized.

The curse jerked in shock as its arm was caught. "Impossible!" it hissed. "You cannot affect the spaces between-"

"I can affect whatever I choose," Indra stated with absolute certainty. With a simple gesture, the crimson aura tightened around Kamui's captured limb.

The curse screamed as its arm began to explode. In desperation, it sacrificed the limb, cutting the connection and retreating further away.

From above, Satoru watched with genuine interest. "He's changing the fundamental properties of space," he commented. "Not just attacking the curse, but changing the rules that allow its technique to work."

Kamui tried to retreat further, opening a larger spiral behind itself. But Indra's crimson aura expanded with incredible speed, intercepting the dimensional shift.

The curse's technique faltered as the crimson energy interfered with its spatial properties.

As the battle intensified, a voice suddenly echoed within Kamui's mind - a cold, ancient presence watching through the curse's own senses.

"Withdraw," the voice commanded. "You've gathered enough data. Return immediately."

Kamui hesitated, its spiral eye spinning with uncertainty as Indra advanced. 'But I haven't completed my purpose,' it responded silently. 'I was created as contingency against the King's return.'

"You've fulfilled your purpose," the voice replied impatiently. "The data on the Sovereign's technique is more valuable than your continued presence there. Return now."

'No,' Kamui decided, its resolve hardening as it faced Indra. 'You created me as contingency against the King. If I cannot stand against his younger brothers, what use would I be against him? I must prove my worth.'

The voice's coldness transformed into icy rage. "You dare defy me? I created you. Your existence serves MY purpose, not your own misguided pride."

'Forgive me, Mother' Kamui replied, cutting the mental connection as it focused all its energy on one final assault against Indra.

The curse's body distorted dramatically, creating a network of dimensional pockets throughout the shrine grounds.

From each pocket, attacks emerged simultaneously, converging on Indra from every possible angle.

Indra's crimson aura expanded in response, creating a perfect sphere of altered space around him.

As Kamui's attacks entered this sphere, they lost their dimensional properties, becoming solid and vulnerable to Indra's counterattacks.

With methodical precision, Indra dismantled each attack, his crimson energy systematically destroying Kamui's extended limbs.

The curse's advantage - its ability to attack from untouchable dimensional pockets - had been completely neutralized.

Realizing its assault was futile, Kamui attempted one final, desperate move. Its entire body began to distort, trying to escape completely into its dimensional sanctuary.

But Indra's crimson aura surged forward, enveloping the curse before it could retreat. For the first time, genuine fear radiated from Kamui as it found itself unable to phase between dimensions.

"Preparing against the likes of us... How presumptuous," Satoru commented from above, his casual tone contrasting with the ice in his eyes as he watched Indra systematically dismantle the curse's defenses.

"Let me tell you something, little spirit," Satoru continued as Indra's presence expanded to fill the entire shrine grounds.

"You can try to prepare for the sky to fall. You can try to prepare for the earth to split open. You can even try to prepare for the oceans rising and swallowing the land, yet the result would still remain the same, utter failure."

'Move damn it! Move! Why can't I move!' Kamui screamed in its mind, forced to its knees by the sheer weight of Indra's presence. Pure fear paralyzed it completely.

"But, even then, preparing for such things even if possible for the likes of you - is nothing compared to thinking you can ready yourself against us," Satoru continued, his voice carrying an unusual weight.

"For you see, what you feel now is merely a shadow of our true might."

'My heart has stopped beating!' The cursed spirit realized in terror as Indra approached with measured steps, each footfall making reality itself tremble.

"You see," Satoru explained, floating lazily above, "we allow the world to sense only a fraction of what we are. We exist in a dimension of strength above all others.

If we were to release the full presence and nature of our cursed energy, few could survive. Most would simply cease to exist under its weight."

After a moment of silence, seeing the curse continue to writhe in futility for escape Gojo continued.

"I see all under Heaven, little spirit," Saturo stated as his Six Eyes gleamed in the moonlight, "and currently - all I see is your death."

Indra's hand, wrapped in crimson light, reached toward the spirit's face.

The curse's dimensional abilities, which had let it evade Kyoto's sorcerers for days, were now completely neutralized by the Sovereign's technique.

In that final moment, as Indra's hand neared its face, the voice returned to Kamui's mind with overwhelming force. "You will NOT waste my creation," it commanded, ancient rage pulsing through their connection.

With a violent surge of foreign cursed energy, Kamui's body suddenly jerked backward, moved by an external will rather than its own.

The paralysis of fear was temporarily broken by this outside intervention, creating a brief chance for escape.

A spiral pattern formed behind Kamui with explosive speed, and before Indra's hand could touch it, the curse was violently pulled backward into the dimensional pocket - not by its own power, but by the ancient will that had created it.

The spiral collapsed immediately after Kamui disappeared, leaving only fading traces of cursed energy in the night air.

Indra's crimson aura pulsed once with frustration before settling back to its usual controlled state. "Interesting," he said, showing no emotion despite the curse's last-second escape. "External intervention."

Satoru descended to stand beside him, his Six Eyes studying the space where Kamui had vanished. "Someone with significant power over dimensions retrieved their toy before you could break it completely."

Yaga and Geto approached cautiously, having maintained the perimeter during the battle.

"So much for capturing it for study," Yaga observed.

"The curse was clearly designed to gather data," Geto noted, analyzing what they had witnessed. "Its creator must have decided they had enough information."

"Or feared what would happen if we destroyed it completely," Indra added, his crimson aura fading from view.

"Either way, this confirms that someone created that curse specifically to gather data on us."

"And spread fear about Sukuna's return," Satoru added, floating lazily above them now that the threat had passed.

"Though I have to admit, the dimensional phasing was almost interesting."

Yaga studied the area where Kamui had disappeared, noting details the others might have missed. "The Higher Ups will want a full report. This goes beyond a simple Special Grade manifestation."

"Indeed," Indra agreed. "Someone is moving pieces on the board, using the Council of Earth's emergence as cover for their own agenda."

'Kenjaku most likely. I can't think of anyone else capable of this.

Though I am not foolish enough to leave out the possibility of it being someone else, for this world is far too different than the original,' Indra thought to himself.

As they prepared to return to their headquarters, Satoru drifted closer to Indra. "That trick with affecting dimensional boundaries," he commented quietly. "That's new."

"Not new," Indra corrected. "Just not previously necessary."

Satoru's eyes gleamed with genuine interest. "You continue to be more interesting than everyone else, little brother."

The full moon continued to shine over Kyoto as they departed, illuminating a city unaware of the forces that had just clashed in its heart.

Unaware of the ancient gaze that had observed everything, analyzing every detail of the Sons of Heaven's techniques with calculating patience.

The game continued, the pieces moved, and the board expanded with each new revelation.

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(Author note: Hello everyone! I hope you all enjoyed the chapter!

Do tell me how you found it! Also, yeah, Kamui - the cursed spirit, has the Kamui ability that Obito has. 

Just wanted to clarify that for those who weren't 100% sure.

Also, do please comment and review if you haven't. We only need three more for this fic to have a star rating - I would very much appreciate it.

So yeah, I hope to see you all later,

Bye!)