Mangekyō Sharingan

But in the very next second, Uchiha Yatsuhashi injected the First Hokage Cell Serum from the scroll into his body.

"Whoosh—!"

A savage surge of First chakra, like a flood bursting through a dam, instantly tore through every channel in his body.

Karatachi Yagura sensed the abnormality in Uchiha Yatsuhashi's body.

He abruptly slid several meters backward, putting distance between himself and Uchiha Yatsuhashi.

He wasn't unfamiliar with the sudden release of a massive amount of chakra.

He had seen it before in Iwagakure's ninja.

It was an extreme ninjutsu used to take the enemy down with you.

But this time, he hadn't expected his judgment to be wrong.

Uchiha Yatsuhashi felt the First's chakra continually tearing his body apart.

The chakra was brimming with vitality and unbelievably domineering, making every bone in his body crack as if it couldn't bear the strain.

The wood-grain patterns beneath his skin appeared once again.

It seemed that in the next second, the vast chakra inside him would spiral out of control, and towering trees would sprout all over his body.

"Gah!"

Amid the agony, Uchiha Yatsuhashi let out a furious roar.

"Eight Inner Gates: Gate of Opening, open!"

The veins bulged on Uchiha Yatsuhashi's forehead as a powerful aura erupted from his body.

And it still wasn't over.

Enduring the pain, Uchiha Yatsuhashi tried to guide the rampaging, uncontrolled chakra within him and force it to break through the remaining gates.

In an instant, a series of low, thunderous booms sounded from within his body.

"Eight Inner Gates: Gate of Healing, open!"

"Eight Inner Gates: Gate of Life, open!"

"Eight Inner Gates: Gate of Pain, open!!!"

Like a high-pressure water pump, the First's chakra instantly blasted open the first three gates of the Eight Inner Gates.

It even seemed to be surging toward the fifth gate, the Gate of Limit.

Fortunately, Uchiha Yatsuhashi had channeled and expended most of the First's chakra while opening the first three gates.

It no longer had the strength to break open the fifth gate of the Eight Inner Gates.

Otherwise, with Uchiha Yatsuhashi's body as it was, he would have fallen apart on the spot.

"Pfft!"

Even so, Uchiha Yatsuhashi still coughed up a mouthful of blood.

His skin began to split open over large areas.

That was the price of forcibly opening the Eight Inner Gates.

As expected, the Eight Inner Gates were meant for "hardworking geniuses,"

not "reckless gamblers" like him.

Without the physical strength to match, forcibly opening the gates was no different from suicide.

"Water Style: Iron Gun!"

Seeing that he wasn't about to blow himself up, a cold glint flashed in Karatachi Yagura's eyes.

A high-pressure water sphere tore through the air and shot straight at Yatsuhashi's face.

However, with the boost from opening four of the Eight Inner Gates,

Uchiha Yatsuhashi's speed had reached a level he had never attained before.

That made it easy for him to dodge Karatachi Yagura's attack.

"Hm?"

Karatachi Yagura's eyes filled with even greater surprise.

How had this Genin's speed suddenly increased so much?

"What strange chakra..."

Karatachi Yagura rapidly formed Hand Seals again.

"Then try this! Water Style: Great Waterfall!"

A massive wave surged outward from him, carrying tremendous force.

In an instant, it crashed toward Uchiha Yatsuhashi.

The wave covered too wide an area for Uchiha Yatsuhashi to avoid it.

With a deafening "Boom!",

Uchiha Yatsuhashi was slammed into the sea by the enormous wave.

The sound of bones breaking rang out clearly.

But strangely, the terrible wounds on his body were healing at a visible rate.

That was thanks to the terrifying vitality of the Hashirama Cells.

As they destroyed the channels in his body, they were also frantically healing him.

"Still not done?"

Karatachi Yagura was getting annoyed.

He had originally treated this as a game of cat and mouse,

but now he found that the mouse before him was like a cockroach that just wouldn't die, no matter how hard he hit it.

Karatachi Yagura suddenly drew in a deep breath, preparing to use his killing move:

Water Style: Water Severing Wave, which could cut through anything.

But before he could form the Hand Seals, Uchiha Yatsuhashi had already charged back in.

He swung a heavy punch at Karatachi Yagura.

Karatachi Yagura raised his arm just in time to block it, but the tremendous force sent him skidding several meters across the water.

Uchiha Yatsuhashi kept pressing him with Taijutsu, giving him no chance to form Hand Seals.

The two fought an intense Taijutsu battle on the sea.

"Bang! Bang! Bang!"

With every exchange, Karatachi Yagura grew more shocked. The Genin whose chakra had been so weak before

was now able to match him head-on for dozens of exchanges, relying purely on strength and speed.

It had to be said that Karatachi Yagura had underestimated him because of his status as a Genin.

Besides, he had wanted to keep them alive so he could seal Uchiha Yatsuhashi and his companion, so he hadn't used his full strength at the time.

That was why Uchiha Yatsuhashi had managed to catch him off guard and send him flying.

But now, Karatachi Yagura was fighting at full strength.

And yet Uchiha Yatsuhashi was still able to keep up with him.

That shocked him all over again.

After another violent collision, the two sprang apart.

Karatachi Yagura looked at his opponent, who was drenched in blood but still had an unwavering gaze.

For the first time, he addressed him seriously. "Genin! Tell me your name."

"Uchiha... Obito."

Uchiha Yatsuhashi panted as he replied.

"Good! Uchiha Obito, I take back what I said.

"With your resolve and strength, you're sure to become an outstanding ninja."

He paused, his voice suddenly turning cold. "Unfortunately, you won't get the chance."

Karatachi Yagura would never allow Konoha to produce a powerful ninja in the future.

Now he had put aside the playful attitude he'd maintained until then.

"Water Style: Water Mirror Technique."

A massive water mirror appeared out of thin air.

A Water Mirror Clone identical to Uchiha Yatsuhashi stepped out of it.

"Bang!"

In the blink of an eye, they closed in on each other, fists and feet colliding in a flurry.

To Uchiha Yatsuhashi's shock, the Water Mirror Clone not only looked exactly like him but also matched him in speed and strength.

Meanwhile, Karatachi Yagura kept firing "Water Style: Iron Gun" from a distance.

One high-pressure water sphere after another shot toward Uchiha Yatsuhashi like a barrage of cannon fire.

The Water Mirror Clone kept him pinned down, leaving him no way to dodge.

In the end, a water sphere blasted apart Yatsuhashi's left shoulder, and his right ribs were kicked in.

His body tumbled across the water like a rag doll.

"Die, Uchiha Obito."

Karatachi Yagura said coldly, "You can be proud of having fought me this far."

With that, he prepared to deliver the final blow.

But the pressure of death made Uchiha Yatsuhashi's desire for power surge to its peak.

And the intense battle had already begun to fuse Uchiha Yatsuhashi with the First Hokage Cells inside him.

Just as his mind was stretched to its limit,

a unique chakra unlike anything before formed in Uchiha Yatsuhashi's brain.

As blood slowly trickled from the corner of his eye, his once-black eyes turned red.

Three bright red Tomoe slowly spun within them.

Then the Tomoe began to twist and deform, finally settling into a strange pattern.

It was the Mangekyō Sharingan, unique to the Uchiha Clan!

Amid the Hashirama Cells and this life-or-death crisis,

Uchiha Yatsuhashi had finally glimpsed the truth of this ultimate ocular technique.

"These eyes..."

Karatachi Yagura stopped attacking and stared fixedly at those eerie eyes.

"Impossible! You're a Genin. How could this be?!"

"Ha! Ha! Ha! Ha!"

Uchiha Yatsuhashi laughed wildly and slowly lifted his head. "Hahahahahahaha..."

Those Mangekyō Sharingan, with their hair-raising gaze,

now stared slowly at Karatachi Yagura before him.

"Now, let me turn the tables."