Synthesis Ninja system

With a scream, Uchiha Sasuke collapsed to the ground, convulsing uncontrollably. Uchiha Itachi slowly turned around.

"Your opponent now is me!"

Shiro trembled. Uchiha Itachi and Hoshigaki Kisame were completely different types of opponents. Kisame mainly relied on taijutsu (hand-to-hand combat) and water-style jutsu. If Kisame underestimated his opponent and didn't use his water techniques, Shiro still had a chance to sneak in some attacks. 

But Uchiha Itachi was entirely different.

Itachi's greatest strength wasn't his genjutsu (illusionary techniques), fire-style jutsu, or shuriken techniques—it was his intelligence. Only after that came his eye techniques. Compared to Itachi, Shiro's abilities felt insignificant.

Fortunately, Itachi still held some loyalty to the Hidden Leaf Village, so Shiro didn't fear him going all out to kill.

Itachi extended his arm from his cloak, pulling off his red-clouded black cloak and tossing it high into the air. In an instant, a large flock of crows flew up, and Itachi's figure vanished completely.

**Ding! Identified jutsu: Crow Clone Technique!**

**Ding! Identified jutsu: Bubble!**

Shiro shuddered and immediately leaped backward. Suddenly, the crows in the air transformed into shuriken, targeting Shiro's anticipated landing spot. In an instant, Shiro was struck by dozens of shuriken.

*Poof!* Shiro's body dissolved into a cloud of smoke and vanished. 

"It seems, Uchiha Shiro, you're quite strong! But still, not enough." The first part of Itachi's sentence echoed from afar, but the next part was spoken right behind Shiro.

"Explode!"

*Boom!* Shiro's body detonated, forcing Itachi back several steps. "As expected, you're much stronger than my foolish little brother. But this game ends now."

**Ding! Identified genjutsu: Pre-set Illusion!**

Shiro trembled again. This genjutsu was one of Itachi's masterpieces. Because Itachi didn't trust anyone in the Akatsuki, he would always cast a pre-set genjutsu on those he interacted with. Normally, the genjutsu had no effect, but if a specific condition was triggered, it would activate fully. Very few people could withstand it.

Since Shiro was already trapped in the genjutsu, his only option was to continuously release jutsu to avoid getting assassinated.

"Fire Style! Phoenix Flower Jutsu!"

"Water Style! Water Dragon Jutsu!"

"Earth Style! Earth Dragon Jutsu!"

...

Shiro unleashed a series of jutsu, one after another, causing Itachi to frown slightly.

"This kid has an astonishing amount of chakra. He's definitely not a nobody. Why have I never heard of him?"

"Itachi, what should we do?"

"The Jinchuriki escaped. That person should be arriving soon. There's no need to waste any more time here."

"But we could easily kill this kid," Kisame said, clearly irritated.

"Kisame, remember our mission!"

Frustrated, Kisame donned his red-clouded cloak again, giving Shiro one last glare. 

"Uchiha Shiro, I'll remember your name!"

With that, Itachi and Kisame vanished, just as Jiraiya and Naruto rushed over from the distance.

"Kid, where are those two in red-clouded cloaks?"

"They were just here," Shiro replied.

"Ugh, you're unreliable. Let me ask Shiro instead," Jiraiya sighed, glancing at Naruto before noticing Shiro still relentlessly casting jutsu. His eye twitched.

"Genjutsu? Break!" Jiraiya attempted to dispel it, but it didn't work. "Looks like I'll have to knock you awake!" He charged at Shiro.

Though Shiro's jutsu were powerful, they weren't specifically aimed at anyone, so Jiraiya was able to dodge them with ease.

"Gotcha! Time to wake up!" Jiraiya shouted, raising his fist to punch Shiro in the face.

Suddenly, Shiro's body began to swell.

*Bang!* Jiraiya was caught off guard and was blasted back several meters before regaining his footing.

"Damn it! Since when did he learn this jutsu? And doesn't he run out of chakra?!" Jiraiya grumbled, now wary of getting close again. He then moved to check on Sasuke.

"Aren't you going to help Shiro?" Naruto asked.

"You can help if you want! Besides, once he runs out of chakra, he'll stop."

"I'm not leaving my friend! Shadow Clone Jutsu!"

In an instant, the street was filled with hundreds of Naruto clones.

"Go! Wake up Shiro!"

**Ding! Identified jutsu: Multi-Shadow Clone Jutsu!**

Shiro paused for a moment. This jutsu was made famous by Naruto. Due to Naruto's enormous chakra reserves and strong mental resistance, he could withstand the emotional feedback from his clones when they were destroyed. That allowed him to use the technique limitlessly in battle.

Knowing Naruto was here, Shiro decided to stop his relentless jutsu spree. He then cast a release on himself to break the genjutsu.

The streets were now covered in mud and water, with Naruto lying on the ground, eyes rolling back in fear. 

Jiraiya sighed, "With that level of jutsu intensity, even I'd struggle to stay standing. These youngsters are reckless."

Shiro gave a bitter smile, realizing he had unintentionally knocked out Naruto. Fortunately, it wasn't fatal—Naruto had just swallowed too much mud and water.

"Uchiha kid, tell me, what jutsu hit him?" Jiraiya asked seriously.

"Tsukuyomi."

Jiraiya trembled. He had heard of Tsukuyomi but had never seen it until today. He didn't expect that such a jutsu could break a ninja's spirit in such a short amount of time.

"It seems I have no choice but to find her."

Jiraiya sighed and was about to stand up when a green blur suddenly kicked him in the face.

**Ding! Identified taijutsu: Leaf Whirlwind!**

Jiraiya was sent flying several meters before looking up to see Might Guy, standing awkwardly.

"What's wrong with you?!"

"Sorry! I left too quickly and forgot my mirror. I used my headband as a substitute, and there was a slight miscalculation!"

As Jiraiya and Guy bickered, Shiro finally exhaled in relief. At least the story had returned to its normal course, though the butterfly effect was already in motion. Who knew how the plot would change next?

Before that, he needed to get stronger.

(End of chapter)