Sign in From Naruto

The Fire Release: Great Fireball Technique, though a signature jutsu of the Uchiha clan, was only a C-rank technique at best. Even in the hands of a prodigy like Uchiha Itachi, the diameter of the fireball wouldn't exceed five meters.

Yet, with a single casual strike, Xu Fan had expanded the fireball's diameter to over twenty meters.

If Xu Fan hadn't held back at the critical moment, Sasuke would have been severely burned and sent to the hospital.

Sarutobi Hiruzen, who had been observing the scene through his Telescope Technique, couldn't help but inhale sharply.

From the speed of Xu Fan's hand seals, it didn't seem like he had mastered the technique. In fact, there were no signs that he had even practiced it before.

It was almost as if Xu Fan had mimicked Sasuke's Great Fireball Technique on the spot.

It wasn't just the sheer amount of chakra that was impressive. Naruto Uzumaki also possessed an enormous chakra reserve, far surpassing that of an average jōnin. However, Naruto lacked talent and couldn't even perform a decent Shadow Clone Technique.

"For a ninja, chakra alone isn't enough... The ability to grasp ninjutsu at a glance is what's truly terrifying," Hiruzen thought, his gaze fixed on Xu Fan through the crystal ball.

Another figure came to mind—Kakashi Hatake, famously known as the Copy Ninja.

"Thanks to his Sharingan, Kakashi can copy his opponent's techniques and use them instantly. But this fighting style places a heavy burden on his chakra."

"As for Xu Fan, while his copying speed isn't as fast as Kakashi's, he doesn't have the same limitations..."

What was most frightening was that Xu Fan could effortlessly amplify the power of his opponent's techniques.

It was no exaggeration to say that Xu Fan had elevated the Great Fireball Technique, a C-rank jutsu, to at least a B-rank level.

"Wait..."

At that moment, Hiruzen thought of an even more terrifying possibility.

To Xu Fan, this was just a sparring match, not a life-or-death battle. He only needed to make Sasuke recognize the gap between them and force him to concede.

"He didn't go all out."

Hiruzen's lips twitched.

If Xu Fan had unleashed his full chakra, how large could the Great Fireball have been?

Thirty meters? Fifty meters? Or even more?

"This kid from the Senju clan... is truly terrifying."

"Speaking of which, how many chakra natures does he possess?"

Suddenly, Hiruzen's eyes widened as another shocking thought occurred to him. "Could Xu Fan... use Wood Release?"

Meanwhile, on the ninja academy's playground.

Seeing Sasuke sitting on the ground, paralyzed with shock, Xu Fan immediately dispelled his jutsu.

Whoosh!

The massive fireball disintegrated mid-air, dissipating into smoke.

The other students were dumbfounded, their expressions as if they had seen a ghost.

They had thought Sasuke's Great Fireball was impressive, but Xu Fan's version was on an entirely different level.

Was that even ninjutsu? It felt more like a divine technique!

Mizuki and Iruka, as chūnin, understood Xu Fan's fearsomeness better than anyone else present.

This wasn't just a genius—this was a monster. An unreasonable, terrifying monster.

Even Iruka, usually composed, was so shocked that he forgot to perform the Seal of Reconciliation.

Did Xu Fan even need to attend the ninja academy?

"Iruka-sensei, can we wrap this up?" Xu Fan turned to Iruka, his tone calm and gentle. "It seems Uchiha-san doesn't want to continue."

Continue? How could Sasuke possibly continue?

If they were in Sasuke's shoes, they'd be traumatized.

Many of Iruka's students cast sympathetic glances at Sasuke, wondering how much psychological damage this incident would cause him.

"Uh..." Iruka snapped out of his daze and glanced at his report card. "Ah... yes, the spar is over. Senju-san, the Seal of Reconciliation..."

"Sure," Xu Fan responded, walking over to Sasuke and extending a hand.

Sasuke stared at Xu Fan's hand, his mind blank.

Instead of accepting Xu Fan's gesture, Sasuke tried to stand on his own. But his legs failed him.

It wasn't until his third attempt that he managed to get back on his feet.

But the Sasuke of today was a shadow of his former self, utterly shaken by Xu Fan's overwhelming display.

Mechanically, Sasuke performed the Seal of Reconciliation.

Who am I? Where am I? What just happened?

Where is my brother?

Mizuki, meanwhile, stared blankly at the scene. He had expected to feel jealous of Xu Fan's talent after witnessing such an exaggerated Great Fireball.

But instead, he found himself questioning his own existence.

Am I really a chūnin?

Is Xu Fan really a first-day student?

Is this world even real?

What is ninjutsu? What is a ninja?

"It's... unbelievable," Iruka muttered, taking a deep breath. "Senju-san's Great Fireball... it's incredible. You must have been practicing this technique for years, right?"

In Iruka's mind, the only explanation was that Xu Fan had spent years mastering the technique. Sasuke had simply stumbled into Xu Fan's area of expertise.

But Xu Fan shook his head. "No, this is the first time I've used a ninjutsu."

"Just now, when I saw Uchiha-san perform the hand seals, I thought I'd give it a try. I didn't expect it to work."

"What?!"

Iruka and Mizuki's eyes widened, their minds reeling.

First time using a jutsu?

What do you mean, 'first time'?

What do you mean, 'didn't expect it to work'?

What kind of divine-level modesty is this?

However, Xu Fan wasn't being modest. This truly was his first time using a ninjutsu.

"It must be because of the sign-in reward," Xu Fan realized.

The "proficiency" reward from the sign-in system allowed him to instantly master low-level techniques just by observing them.

"Does this mean I can learn any ninjutsu just by looking at it?"

As Xu Fan pondered this, a system prompt echoed in his mind.

"Proficiency" does not equate to absolute mastery. Would you like to view detailed instructions?