Using ninjutsu in front of Kisame and Samehada…
It was almost the same as handing him free chakra.
"Earth Style: Flowing River—"
Boom!
Kisame braced Samehada, ready to absorb chakra. He waited for Yuichi's seals to finish—
but the boy's hands only flashed through a final sign before the technique was already complete.
What—? He skipped the seals entirely?
The ground beneath Kisame's feet erupted into a rushing torrent of mud, sweeping him away like a flood.
Boom, boom, boom!
His massive frame crashed through several trees before he finally jammed Samehada into the ground, halting his slide.
Covered head to toe in muck, Kisame spat dirt and glared at Yuichi.
"This brat's ninjutsu… the power behind it is ridiculous."
It wasn't just strong—Yuichi's chakra was still overflowing. Even after summoning thousands of Shadow Clones earlier, he had enough left to unleash techniques on this scale.
A grin spread across Kisame's face, sharp teeth glinting. The more chakra, the better.
Yuichi didn't give him time to breathe.
"Wind Style: Great Breakthrough—"
A storm roared into existence, a hurricane tearing forward with ferocious speed. Trees shattered and debris whirled through the air.
Kisame's eyes widened.
This is just… a C-rank Wind Style? Impossible!
The destructive force in front of him was closer to an A-rank jutsu. The pressure alone was enough to leave him stunned—he even forgot to feed the chakra into Samehada.
The gale lifted him bodily into the air, tossing him like a rag doll.
And then—
"Fire Style: Majestic Destroyer Flame—!"
Yuichi's voice thundered through the storm.
Kisame's eyes snapped wide, bloodshot with disbelief.
A compound jutsu?! He chained Wind and Fire instantly—like it was nothing! What kind of monster…
Flames bloomed, a tiny spark swelling into a raging inferno. The firestorm spread with terrifying speed, fed by the winds until it devoured half the forest in an instant.
The blaze rushed toward him, filling the sky with searing heat.
"Samehada…" Kisame muttered desperately.
The living blade writhed, sucking at the flames as they engulfed him. His flesh burned, skin bubbling and blackening—but Samehada drank greedily, funneling chakra back into his body, knitting him together even as the fire charred him to ash.
Yuichi didn't stop. He exhaled torrents of flame without pause, the blaze roaring higher and higher, until it was like a second sun rising in the forest.
The inferno dwarfed even Uchiha Madara's infamous firestorm from the Great Ninja War. Fueled by Yuichi's monstrous chakra, it was even stronger.
Kisame's body withered and healed, burned and restored, over and over again. The agony was constant, unbearable. His mind began to fray under the relentless cycle of searing pain and hollow regeneration.
In the distance, Uchiha Itachi stood on a branch, crimson Sharingan glinting. His eyes narrowed at the hellish flames.
What Fire Style is this…? No technique should have power like this.
Even as a master of Fire Style himself, Itachi was shaken. He blurred forward, vanishing toward the battlefield.
···
At last, Yuichi lowered his hands. The flames gradually died, leaving the forest scorched black for hundreds of meters.
With a wave, he summoned a stream of water to clear a path through the embers and walked forward.
A hundred meters ahead, a charred body lay collapsed. In its hand—Samehada, its scales glowing red from the heat, burned and smoking.
Kisame's flesh was blackened and cracked, but faint breaths still escaped his ruined lungs. Samehada continued to pump stolen chakra into him, keeping him barely alive.
Yuichi's eyes narrowed. He drew his black blade.
The Tailless Tailed Beast… his bounty will be worth a fortune.
He raised the sword to pierce Kisame's throat—
—and froze.
Danger surged through his instincts. In the same heartbeat, he vanished with Body Flicker.
Boom!
Black flames erupted where he had stood.
Amaterasu.
A figure stepped into view. Uchiha Itachi. His expression was calm, but his eyes glowed with Mangekyō power.
"You were a little slower than I expected," Yuichi muttered.
Itachi ignored him, kneeling beside Kisame's mangled body. Shock flickered across his face. That someone could injure Kisame this badly… and it's just a boy…
Lifting Kisame with effortless grace, Itachi leapt into the burning forest, retreating swiftly.
Yuichi remained still, gaze lingering on the black flames of Amaterasu that scorched the earth. His hands clenched at his sides.
Mangekyō Sharingan… Amaterasu's flame. What terrifying power.
He had been a split-second from being consumed by it.
As the last traces of the Uchiha duo disappeared into the distance, Yuichi exhaled slowly.
"The reward slipped away this time… tch."
But in his heart, a new thought lingered.
Tsukuyomi… Amaterasu… That's the strength of the Sharingan.