Implanting Illusions

What?

Hōzuki Mangetsu stared at the mad scientist before him in astonishment.

As a transmigrator, he naturally understood the essence of chakra.

But he had not expected Amachi to be capable of suspecting this as well; he truly could not be underestimated!

Amachi smiled faintly and said, "The essence of genjutsu lies in this principle. The caster can use chakra resonance to disrupt the five senses of the target, thereby inducing hallucinations. In other words, both parties can be connected through chakra. While ninjutsu uses chakra to manipulate the five elements, genjutsu acts directly upon the human spirit. Chakra is the channel that connects one person's spirit to another."

So that was it!

Although Hōzuki Mangetsu knew the plot, he had never researched it as thoroughly as Amachi.

"What exactly is this 'implanted genjutsu' that Mr. Amachi speaks of?"

He asked, puzzled.

Back then, Uchiha Itachi had been able to implant Amaterasu into his younger brother's eye, which had already amazed him greatly. Later, when Obito could bestow his own power upon Kakashi to manifest the Susanoo, he had been left speechless.

However, hearing Amachi's explanation, he vaguely began to understand something.

Amachi was slightly excited; like Orochimaru, he was a science fanatic who loved to study everything.

Over the years, he had conducted quite a bit of research in private. Implanted genjutsu was merely one of his many projects.

"Since chakra is the bridge connecting people, then theoretically, genjutsu can also be cast through implantation. As long as the chakra between the two is linked, one can use this bridge to alter the other's will."

Amachi adjusted his glasses and continued unhurriedly, "I have conducted many experiments that have proven this hypothesis. It is possible to modify another's will through chakra contact. The pity is that once the input chakra is exhausted, the genjutsu naturally dissipates. Therefore, to permanently alter someone's will, one must periodically input chakra into the subject to ensure the genjutsu remains effective."

A flash of inspiration struck Hōzuki Mangetsu, and he suddenly understood one thing.

Perhaps this was the reason why Uchiha Obito was able to control Yagura. With Obito's strength, implanting a genjutsu into Yagura's body should have been no problem. Once the genjutsu was activated, he only needed to channel chakra into his body at regular intervals to maintain continuous control.

This was also why Uchiha Obito had to stay by Yagura's side so often; he needed to frequently supply chakra to Yagura's body.

Realizing this, Hōzuki Mangetsu felt a surge of excitement. He had found a way to break Obito's genjutsu.

"There is a perfect opportunity right now; don't you want to try it?"

Amachi smiled and said, "I can help you implant the genjutsu into this person's mind. Once he wakes up, he will be your puppet. Furthermore, as long as you periodically channel chakra into his body to maintain the genjutsu's effect, you can control him completely without worrying about him turning on you."

This technique of inputting genjutsu was something he had researched inadvertently, something even Orochimaru was unaware of.

That was why he had the confidence to break away from Orochimaru.

The Hōzuki Mangetsu before him seemed like a decent partner, and Amachi naturally wanted to demonstrate his own value.

Soon, with Amachi's help, Hōzuki Mangetsu successfully implanted the genjutsu into Chukichi's mind.

At the same time, the Cursed Seal was activated, and Hōzuki Mangetsu's chakra was continuously channeled into Chukichi's mind.

The permanent genjutsu was complete.

"Lord Mangetsu!"

Upon waking, Chukichi knelt before Hōzuki Mangetsu, looking at him with sincere devotion.

Chukichi's memories of the last few years had been erased, replaced by the new memories Hōzuki Mangetsu had fabricated for him.

In these memories, Hōzuki Mangetsu was his master who had saved him many times, and he was bound to be loyal to Hōzuki Mangetsu.

Perfect!

Hōzuki Mangetsu marveled as he watched this unfold.

Implanting genjutsu was not complex; it only required connecting the chakra between two individuals, and the simplest method was physical contact.

Chukichi, being unconscious, could naturally offer no resistance, and he was easily brainwashed by Amachi, with the genjutsu successfully implanted.

Years ago, he had been ordered to do this to Anko, which was why she still could not recall her memories of the Land of the Sea to this day.

As the genjutsu was implanted, the Cursed Seal automatically sensed Hōzuki Mangetsu's chakra, and the two were immediately linked.

The Cursed Seal itself contained his chakra, and because it absorbed natural energy, the chakra within the seal would never run dry.

If the implanted genjutsu was a lightbulb, then the Cursed Seal was a power source—a power source that could provide energy forever. This meant that once a person implanted with this genjutsu was branded with the Cursed Seal, they became Hōzuki Mangetsu's puppet forever, until death.

This was essentially a weakened version of Kotoamatsukami.

Hōzuki Mangetsu had originally thought that Kotoamatsukami could only be used by those who had fused with Hashirama's cells, but he had stumbled upon a way to replicate it ahead of schedule.

With the Sharingan combined with the Cursed Seal, the effect of Kotoamatsukami could be fully achieved.

As long as he grasped this principle, he himself would be able to use the power of the Sharingan to implant genjutsu.

"Can you do me a favor?"

Hōzuki Mangetsu smiled at Amachi.

Amachi nodded.

The two were now partners, and helping each other was only expected.

"Help me transplant an eye!"

As he spoke, Hōzuki Mangetsu produced a container holding a Sharingan.

This was the eye of Uchiha Shisui.

"Sharingan!"

Amachi nodded.

The Uchiha's Sharingan was a valuable thing. Konoha's people coveted this power, so it was understandable that Hōzuki Mangetsu wanted to transplant it.

Alright!

For a high-level medical ninja like Amachi, transplanting an eye was a piece of cake.

In the time it took to eat a meal, Hōzuki Mangetsu's right eye was replaced with a Sharingan!

When he opened his eyes, the reflection in the mirror showed him with a three-tomoe state.

In an instant, his chakra surged, and his perception increased dramatically.

He suddenly clutched his right eye, cold sweat trickling down his face.

"With increased power comes increased risk. A body not belonging to the Uchiha Clan will find using the Sharingan a burden."

Amachi pushed up his glasses and said unhurriedly.

He was a research fanatic, not particularly keen on power.

Not bad!

Just as he thought!

Hōzuki Mangetsu wiped the cold sweat from his face and released his right hand.

After some time, he gradually adapted to the Sharingan.

"Amachi!"

Hōzuki Mangetsu suddenly called out.

What?

Amachi looked up unexpectedly. The moment he saw Hōzuki Mangetsu's Sharingan, he knew something was wrong.

He desperately tried to close his eyes, but how could the Sharingan of the strongest genjutsu ninja be so easily escaped?

Soon, Amachi gave up resisting, his eyes becoming vacant.

He had fallen victim to the Sharingan's genjutsu.