Sharingan

"Shisui, if you don't start taking this seriously..."

"The Uchiha Clan's glory is going to fade at your hands today."

As he kept pressing forward against Shisui, Yu taunted him, hoping to draw out his full strength.

"In that case... I won't hold back!"

"The Uchiha Clan's glory must not be tarnished!"

At the mention of the Uchiha Clan, Shisui's expression finally turned serious.

Whoosh!!

The instant the words left his mouth, Yu saw a flicker before his eyes.

A figure identical to Shisui shot out from behind him and leaped high into the air.

A Shadow Clone!!

So fast! When did he weave the Hand Seals?!

Faced with Shisui's incredible Shadow Clone Technique, even Yu couldn't help but feel astonished. He hadn't noticed when Shisui had woven the Hand Seals at all.

"Watch out, Yu."

"Fire Release: Great Fireball Technique!!"

The other Shisui, leaping high into the air, called out a warning as his hands formed Seals at incredible speed.

He took a deep breath, about to unleash a huge, scorching fireball at Yu below.

"Fire Release, huh..."

Shisui's Shadow Clone had Yu's hands occupied, while the real Shisui above him was about to use a Fire Release Ninjutsu.

Yet Yu's calm expression didn't change in the slightest. Instead, the corner of his mouth lifted for some reason.

"Still too slow... Shisui."

Could it be?!

Noticing the strange smile on Yu's face, Shisui's heart skipped a beat as he prepared to unleash his Fire Release Ninjutsu.

"Zzzzt..."

But it was already too late. A burst of violent electrical crackling rang out.

Yu suddenly spread his hands before the two Shisuis, and a torrent of electricity surged through his entire body.

Shisui and his Shadow Clone felt a sharp, numbing pain throughout their bodies. They could no longer move.

Lightning Release: Chidori Current!!

By releasing the electricity of Chidori throughout his body, this technique lacked Chidori's destructive power, but had a wide range and could paralyze people. It was both offensive and defensive.

After a year of training, Yu had finally mastered this variation of Chidori.

"What an astonishing Ninjutsu!"

The Third Hokage watched Yu use Chidori Current with his own eyes. Beneath his hat, his eyes were filled with amazement.

"He's only six, yet he's already mastered this level of nature and shape transformation..."

"This kid is a prodigy!!"

"Poof! Poof!"

Before anyone could recover from Yu's dazzling Lightning Release Ninjutsu, two faint popping sounds rang out.

The two Shisuis Yu had hit with Chidori Current turned into clouds of white smoke and disappeared!

They were... both Shadow Clones?!

Everyone was stunned by the sudden turn of events. Even Yu couldn't help but freeze for a moment.

"I didn't know your Lightning Release could do that..."

"If I hadn't kept something up my sleeve, I'd have lost by now, wouldn't I?"

Hearing the familiar voice behind him, Yu instinctively spun around—only to see Shisui's lightning-fast kick filling his vision.

"Bam!!"

Caught off guard, Yu reacted quickly and lowered his arms to block.

But the force of Shisui's kick sent Yu flying into the air despite his attempt to brace himself.

Whoosh!!

After kicking Yu into the air, Shisui didn't stop attacking. He vanished from the spot in an instant.

"That's... the Body Flicker Technique?!"

Seeing the terrifying speed Shisui displayed on the Training Ground, not only the onlookers but even the Third Hokage was taken aback.

The Body Flicker Technique—a general term for all "techniques that allow high-speed movement," including high-speed Taijutsu, elemental Ninjutsu, and Space-Time Ninjutsu.

It wasn't an especially advanced Ninjutsu, but anyone able to use the Body Flicker Technique so fluidly in battle had to be at least a Chunin.

"The Body Flicker Technique, huh..."

"Just as you'd expect from the future 'Body Flicker Shisui'..."

Suspended in midair, Yu faced Shisui's rapidly moving figures all around him and the heavy blows they unleashed. He couldn't help but marvel.

No wonder Shisui would become renowned throughout the world for his mastery of the Body Flicker Technique and earn a title like "Body Flicker Shisui." He was already using it so skillfully in battle at this age.

"Wait... his eyes?!"

Yu used his elbow to block another powerful strike from Shisui's Body Flicker Technique.

But when he saw Shisui's eyes, his expression became impossible to describe.

"Sharingan?!"

At some point, Shisui's eyes, once black, had turned a blood-red color.

A black Tomoe was clearly visible in each eye, reflecting an eerie glow.

"The Sharingan! It's the Sharingan!!"

It wasn't just Yu. The Third Hokage had also noticed the change in Shisui's eyes, and his aged face filled with incredulous shock.

"He awakened the Sharingan at six?!"

"You've got to be kidding me?!"

Seeing the change in Shisui's eyes, Yu felt as though ten thousand horses were stampeding through his heart.

Even Itachi hadn't awakened his Sharingan until he was eight. But Shisui before him had awakened his at just six. How could Yu not be shocked?

The Sharingan was the Kekkei Genkai the Uchiha Clan relied on to establish its fearsome reputation throughout the Ninja World.

It had clearly defined stages: the single-Tomoe Sharingan granted far greater dynamic vision than ordinary eyes and could see through high-speed Taijutsu movements; the Two-Tomoe Sharingan could copy most Ninjutsu and Taijutsu; the Three-Tomoe Sharingan could predict an opponent's movements and cast Genjutsu on them through eye contact.

Beyond these ordinary stages, Yu knew that above the Three-Tomoe Sharingan were the powerful Mangekyō Sharingan and Eternal Mangekyō Sharingan—and that it could even evolve into the eyes of the Sage of Six Paths: the Rinnegan.

That was why Yu had regretted not being born into the Uchiha Clan when he first crossed over.

Whether for support or combat, the Sharingan's many incredible abilities made it one of the most powerful cheats in the Naruto World.

"It's over, Yu."

"From the moment I opened these eyes..."

"I've been able to see through every one of your moves!!"

Ignoring everyone's astonishment, Shisui widened his blood-red, eerie eyes and fixed his gaze on Yu below him.

"Flash Slice!!"

The instant Yu's body hit the ground, Shisui drew the Kodachi on his back for the first time.

Using the Body Flicker Technique, he turned into a streak of light and launched a razor-sharp slash from above!

Though it was still only a single-Tomoe Sharingan, it let Shisui see more of his opponent's movements, greatly improving his perception and agility.