Scientific Prosthetic Eye

Uchiha Chen, known as Chen Yuan in his past life, was nothing more than an ordinary, slightly introverted art student.

As it happened, he had failed to get into art school and was preparing for a second attempt.

Who would have guessed that one day, while playing the game Bonds recommended by a friend, he would inexplicably transmigrate and become ten-year-old Uchiha Chen.

That time was the eve of the Third Great Ninja War; the Shinobi World was in turmoil, with a storm brewing on the horizon.

Painting had no future, so he had better prepare for the Third Great Ninja War!

Perhaps because he had just cleared the original storyline of Bonds before transmigrating, he found himself clutching the "Ultimate Prosthetic Eye" of the Bonds final boss the moment he arrived.

(There is an introduction to this prosthetic eye and Uchiha Hikari in the bonus chapter; those who don't know about it can take a look.)

With a scientific prosthetic eye capable of copying even the Mangekyō Sharingan, wouldn't he be able to soar to the heavens?

Uchiha Chen even practiced Medical Ninjutsu diligently for this very reason, all to be able to transplant the prosthetic eye into himself.

But who could have expected that this prosthetic eye was a massive trap—

It could copy ocular techniques and Mangekyō Sharingan; the final boss in Bonds could even manifest a Complete Body Susanoo using it.

But all of this came at a price:

It required a massive amount of Chakra to start up and function!

If the consumption of a Sharingan for an Uchiha was 1, and the consumption for someone like Kakashi transplanting a Sharingan was 10, then the consumption for this prosthetic eye was 100.

With Uchiha Chen's small physique and Chakra reserves, it was like a small horse pulling a train;

It was simply useless!

Helpless, Uchiha Chen had to abandon the opportunity to reach the top in one step and embarked on the traditional path of an Uchiha:

Hard training in Fire Style, shurikenjutsu, and Dance Technique—going to the battlefield—receiving the stimulus to awaken the Sharingan—improving his Dance Technique and other abilities—awakening the Three-Tomoe Sharingan.

After muddling through, he eventually became a jōnin, which finally gave him the ability to scheme for the Nine-Tails Chakra in the hands of Kazuma.

Night.

In the basement of Uchiha Chen's home.

Uchiha Chen checked the surgical instruments for the eye transplant one last time and opened the scroll sealed with the Nine-Tails Chakra.

He did not understand the high-level sealing techniques used to seal Tailed Beasts.

But after all, this was only a small portion of the Nine-Tails' Chakra; according to the records on Kazuma's scroll, the "Five Elements Seal" would be enough to seal this Chakra into a human body.

There is no turning back and no other options!

The Night of the Nine-Tails means the widening of the rift between the village and the clan, and after that comes the Night of the Uchiha Massacre.

In such a situation, the combat power of a single jōnin is simply useless!

Under the dim light of the basement, Uchiha Chen muttered to himself, resolutely forming hand seals.

Five Elements Seal!

Ah.

A tremendous pain radiated from the seal on his lower abdomen.

Uchiha Chen's veins bulged, and he bit his gums until they bled, yet he still gritted his teeth and refused to cry out.

With the restriction of the Sealing Technique, only a tiny fraction of the Nine-Tails' violent and ominous Chakra leaked into his meridians, but it still caused significant damage to his internal body.

The bone-piercing pain persisted.

Once the pain subsided slightly and he was able to move, the pale-faced Uchiha Chen immediately used the Shadow Clone Technique, creating a shadow clone.

"From here on, I leave it to you!"

The clone nodded solemnly and began to disinfect and organize the instruments.

Uchiha Chen lay flat on the experimental bed where he usually dissected animals and studied Medical Ninjutsu, calmly injecting an anesthetic into his vein.

It was just an eye transplant; in the realm of Medical Ninjutsu in the Shinobi World, it was merely a "minor surgery."

I wonder how long this Nine-Tails Chakra can support the operation of the prosthetic eye?

Thinking about these random things, Uchiha Chen soon drifted off to sleep.

When he opened his eyes again, a strong sense of foreignness came from his eye sockets.

The prosthetic eye transplant surgery was complete.

After a long while, the recovered Uchiha Chen stood up with the help of his clone and walked slowly to sit in front of the mirror.

"My task is finished; do the rest of the work yourself!"

After a 'poof' of smoke, the clone dissipated.

The memories of the several hours in the operating room flooded in instantly, and a violent wave of dizziness almost made Uchiha Chen vomit, but he still stared fixedly at his eyes in the mirror.

Oh, no!

His eyes were now in the culture medium on the table; what was in his eye sockets should be called a prosthetic eye.

The pitch-black, spirited pupils and the pale whites of the eyes seemed no different from his original eyes under normal conditions.

Uchiha Chen carefully examined the Prosthetic Eye for a moment, feeling quite satisfied, and immediately refined his Chakra to flow into it.

Three tomoe quickly manifested within the pupil.

It felt dry and sluggish, nowhere near as fluid as Uchiha Chen's original eyes, but—

This Prosthetic Eye was capable of reaching the Mangekyō level!

Seal, partially released!

The Nine-Tails Chakra, which had just settled down, surged violently, attempting to drown Uchiha Chen's body like a raging tide, only to be swept away by the ravenous Prosthetic Eye the moment it occupied his meridians.

A second eruption, a third eruption.

The Nine-Tails Chakra was a wild torrent, but the Prosthetic Eye was an ocean that accepted all rivers, a black hole capable of devouring everything.

Seven bursts in an instant, and the Nine-Tails Chakra was defeated and miserable!

From crashing waves to a trickling stream, until not a single drop could be squeezed out, the withered and listless source of Nine-Tails Chakra was once again sealed away by Uchiha Chen.

Hoo!

Uchiha Chen let out a long breath, focusing his mind to carefully perceive the changes in the Prosthetic Eye.

As a member of the Uchiha clan, even though he was not yet an adult, Uchiha Chen's Chakra reserves already exceeded those of an average jōnin.

Yet, in a short period, the Nine-Tails Chakra had injected dozens of times that amount into the Prosthetic Eye.

With such a massive energy source, this Prosthetic Eye finally began to [work].

Or rather, it was "awakening"!

After the massive amount of Chakra was converted through the complex internal structure of the Prosthetic Eye, a high-quality Yin Release Chakra, extremely cold and biting, was born.

The moment he sensed this Chakra, Uchiha Chen was suddenly stunned.

Within his previously clear field of vision, a virtual light screen suddenly appeared, playing an animation similar to a startup sequence.

[Prosthetic Eye-001, activated]

Several pitch-black characters slowly emerged before rapidly twisting and flowing, transforming into an extremely simple operation panel.

[Prosthetic Eye-001]

Eye Power: 10.5/1000

[Imprint 1: Imprinted—Uchiha Hikari]

Dōjutsu:

1. Amaterasu, ignites inextinguishable black flames. Eye Power cost: 2/use

2. Tsukuyomi, controls all aspects of genjutsu. Eye Power cost: 3/every 72 hours

3. Kagutsuchi, Flame Release shape transformation. Eye Power cost: 1/minute

4. Yachihoko, controls the power of spirit and Chakra. (Currently unavailable)

5. Susanoo, the God's Power symbolizing destruction. Eye Power cost: 1~100/minute

[Imprint 2: Empty]

[Imprint 3: Empty]

Four dōjutsu, and as long as there is enough Chakra, he can activate the Perfect Susanoo!

Furthermore, there are two more slots to copy dōjutsu!

"More importantly, I won't go blind! How is this any different from an Eternal Mangekyō?"

Uchiha Chen supported his forehead with one hand, watching through the gaps in his fingers as the three tomoe in the mirror spun rapidly, transforming into three sickle blades.

Locking eyes with the Mangekyō in the mirror, Uchiha Chen's shoulders began to shake uncontrollably, and the curve of his mouth grew wider and wider.

"Ahahahahahahahaha!

Cough, cough!"

Damn, I laughed until I choked!