Reborn into Naruto World with Tenseigan

“It’s over…” murmured Itsuki as he finished sealing Naruto inside the Iron Sand Coffin, intending to suffocate him. With the burial complete, he began to descend, convinced that the battle had ended. In his mind, there was no way Uzumaki Naruto could escape unless he willingly released the jutsu.

“Phew… that wasn’t so ba–” he exhaled in relief.

But before he could finish his sentence, a sudden explosion erupted—Boom! The Iron Sand trapping and suffocating Naruto was blasted away in all directions, scattering chaotically. In the next instant, a towering pillar of ominous orange chakra surged into the sky.

Roar!

“What…?” Itsuki was taken aback by the sudden shift and immediately halted. His eyes widened as he stared at the ominous pillar of chakra before realization struck him. “This is the Nine-Tails’ chakra… don’t tell me he can still access it?”

Naruto had previously tapped into the Nine-Tails’ power against Shira, so it wasn’t impossible for him to do it again. However, Itsuki had assumed that Naruto couldn’t rely on it too often. After all, drawing on a tailed beast’s power was dangerous and difficult—losing control could allow the beast to take over entirely. Because of this, he had believed Naruto would avoid using the Nine-Tails’ chakra repeatedly, fearing it might override his consciousness.

‘Either he doesn’t care… or he’s a fool who doesn’t realize the risk,’ Itsuki thought grimly.

But there was no time to hesitate. If he wanted to win, he had to end the fight immediately—before Naruto could complete his transformation and fully harness the tailed beast’s power.

“Then I have no choice…” Without wasting a moment, Itsuki began weaving hand signs, and once he finished, he raised both hands and commanded the surrounding Iron Sand to surge toward Naruto, who was radiating the Nine-Tails’ chakra like an overflowing tsunami. The Iron sand engulfed him, layer upon layer piling on, forming an enormous pyramid of Iron Sand that trapped Naruto within. The ominous orange chakra flickered violently inside, struggling to break free but was unable to do so because of the Fuinjutsu used, ‘Iron Sand: Black Layered Imperial Funeral Seal!’

“With this… haah… haah… there shouldn’t be any problem now…” Itsuki murmured between heavy breaths, his chest rising and falling rapidly. He gazed at the Iron Sand pyramid with a triumphant grin. “No one can break through—”

Before he could even finish his sentence, a deafening explosion erupted from within the pyramid, shaking its entire structure.

“No… no… he can’t break out of the Imperial Funeral Seal!” Itsuki muttered in disbelief, his voice laced with desperation. But his words were quickly proving false as streaks of ominous orange chakra began to leak from the cracks in the Iron Sand pyramid.

“There’s no way… I won’t allow it…!” he shouted, raising his hand to reinforce both the pyramid and the seal, determined to contain Naruto inside. He poured everything he had into restrengthening the Imperial Funeral Seal, forcing more chakra into it. But the relentless explosions from within told a different story—the seal was faltering, and more and more of the Nine-Tails’ chakra was spilling out, defying his efforts.

“I won’t allow it…!” Itsuki screamed at the top of his lungs, pushing himself to the limit. Blood trickled from his nose due to sheer overexertion, but even that wasn’t enough.

Then, in the next instant—ROAR!

With a ferocious, beastly roar, the Iron Sand pyramid shattered into pieces, torn apart from within. Emerging from the wreckage, Naruto crawled out on all fours, his body enveloped in a blazing cloak of ominous orange chakra. Behind him, seven tails swayed violently, radiating raw, unrestrained power.

As Naruto—or rather, a massive, four-legged beast composed entirely of chakra—emerged from the collapsed pyramid, he slowly advanced toward the Sunagakure Genin.

Itsuki, exhausted from overexertion and thrown off balance by the shockwave of the pyramid’s destruction, collapsed to the ground. “D-damn it…” he muttered, struggling to push himself up. When he finally stood, his breath hitched at the sight before him.

His eyes widened in pure horror. “S-seven tails…” he stammered, his body trembling as he felt the suffocating, malevolent chakra radiating from Naruto up close. His voice barely above a whisper, he uttered a single word, filled with dread.

“M… monster…”

“!!!”

The instant that word left Itsuki’s lips, Naruto—or what remained of his consciousness—suddenly stopped in his tracks. Though his body was entirely cloaked in the writhing, malevolent chakra of the Nine-Tails, his features were nearly indistinguishable. Yet, amidst the shifting mass, one thing stood out clearly—a pair of piercing, glowing eyes and a wide, sinister grin forming in response to Itsuki’s words.

A mocking, almost gleeful grin.

Then, without warning, Naruto opened his mouth.

Bubbles of red and blue chakra floated out of his body, swirling ominously in the air around him, crackling with untamed energy.

“Th-those are…” Itsuki’s face twisted in desperation as he realized exactly what Naruto was about to do.

…

Konohagakure Waiting Room

“This isn’t good…” murmured Kakashi, his palms beginning to sweat as he sensed the overwhelming, ominous Chakra of the Nine-Tails.

“What… what is Naruto doing?” several Konoha shinobi asked in confusion and fear. The oppressive presence of the Chakra sent shivers down their spines, leaving them on the verge of trembling.

“He’s not about to use a Tailed Beast Bomb, is he?” asked Guy, his usual energetic demeanor replaced by a doubtful and serious expression.

“If he does… the entire arena will be obliterated,” Asuma spoke grimly. “We might all end up dying…”

Unlike other Tailed Beasts, the Nine-Tails was in a league of its own. Its power was far beyond that of the others, and if Naruto were to unleash a Tailed Beast Bomb in the middle of the arena, total devastation would be inevitable.

“Are you sure he hasn’t lost control?” Mika questioned; her voice filled with unease.

Kakashi’s eyes narrowed in concern. “I need to speak with Itachi…” Without wasting another second, he vanished in a silver flash.

…

‘Itachi’ stood outside the barrier, arms folded across his chest, observing the battle unfold.

“When he asked about the strength of the barrier… I didn’t expect him to actually use the Tailed Beast Bomb,” he murmured with a thoughtful smile.

Suddenly, in a silver flash, Kakashi appeared beside him. Without wasting a moment, he asked urgently, “Itachi, will the barrier be able to withstand the Tailed Beast Bomb?”

‘Itachi’ gave a brief nod, his gaze remaining fixed on the battlefield. “The barrier can withstand the impact of a single Tailed Beast Bomb. I ensured the entire team put their full effort into reinforcing it, so that shouldn’t be an issue…” He then added, his tone growing more serious, “What concerns me more is the life of the Sunagakure Genin… and whether Naruto-kun has lost control.”

Kakashi, feeling both relief and unease, stared intently at the arena. “I just hope the Sunagakure Genin makes the smart choice and admits defeat… Otherwise, this won’t end well.”

Unless Itsuki surrendered, they couldn’t interfere. And if they couldn’t step in, the chances of him losing his life to the tailed beast bomb were dangerously high.

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