Naruto: The Strongest Sage.

Konoha's highest level laboratory. Only three people in the entire Konoha know about this laboratory.

All the sealing techniques were set by him personally.

Qingye opened the door and walked in.

"Long time no see, Black Zetsu."

This is where Black Zetsu was imprisoned. After capturing Black Zetsu, Aoba spent a lot of energy trying to figure out the secrets of Black Zetsu.

After all, Black Zetsu has many abilities that can be considered bugs in the eyes of many living organisms. He has thoughts, can manipulate chakra, can possess other living organisms at will, and his own body presents a strange fluid.

Aoba was particularly interested in the last point.

The upgrade of the Chakra Coat has reached a bottleneck. If you want to further improve the performance, Qingye's idea is to create a form like the Venom Coat.

A super chakra coat that has multiple effects including autonomous defense, attack, assistance and medical treatment.

However, at present, the only one who can meet this requirement is Black Zetsu.

Black Zetsu, who was curled up into a ball, slowly grew a face.

"Kamikawa Aoba...you're a little different. No, you don't have any chakra. It seems like you've also noticed the old guy's little tricks."

Aoba was not surprised that Black Zetsu knew about this. It was said that Black Zetsu could hide and wait for another thousand years when things got bad. But looking at the plot in the drama, Black Zetsu was actually a little anxious.

Apart from anything else, playing Infernal Affairs in front of a character like Uchiha Madara is a bit inconsistent with Black Zetsu's temperament.

In the plot, Madara was deceived from beginning to end, which was totally inconsistent with his character. He was attacked by surprise in the end, which showed the power of Black Zetsu. But it was obviously a plot kill.

But it still did it. It was probably because it had realized the Six Paths Sage's actions and knew that if it failed this time, it would have no chance in the future.

It was a pity that as a top-level player, although he was careful and cautious enough, he wasted too much time.

So many that the Six Paths Sage has fully developed.

In this respect, the Six Paths Sage is much more cowardly than Black Zetsu.

Even though Black Zetsu rescued his mother in the end, the Sage of Six Paths easily handled everything without even having to do anything himself.

Black Zetsu lost miserably in the end.

After saying hello, Qingye had no intention of continuing to chat with Black Zetsu. Instead, he went straight forward and took away some of Black Zetsu's body tissue.

“Haha, you still haven’t given up? Kamikawa Aoba, even you can’t crack the secret of my body. This is my mother’s last work. Even if my good-for-nothing brother is here, he can’t do it.”

What Black Zetsu said was actually correct. After capturing Black Zetsu, Aoba asked Tobirama to lead the team and use all possible methods to analyze and study it.

But in the end, no useful information was obtained. Konoha's methods at the time were unable to analyze the Yin-Yang escape technique on Black Zetsu.

Qingye originally thought that after he achieved the Six Paths, he would analyze it himself.

However, plans cannot keep up with changes. Aoba has no chakra. Theoretically, it is impossible to analyze the Yin-Yang escape in Black Zetsu's body.

But he can achieve his goal in another way.

Now Qingye's goal has changed. He doesn't need to analyze the Yin-Yang escape in Black Zetsu's body, he just wants the other party's biological sample.

This is relatively simple.

Although Qingye has no chakra, he is now a god, a god unprecedented in the ninja world. Except for death, he has mastered almost all the authority of gods.

This allowed him to easily separate the energy portion from the biological portion of Black Zetsu's body tissue.

In this way, Aoba obtained a pure sample of Black Zetsu biological cells. And this sample was the last piece of the puzzle of the Otsutsuki gene template that Aoba needed.

With the last piece of the puzzle, the laboratory progressed at a lightning speed. In just three days, the first clone of Otsutsuki was cultivated.

However, Qingye still faced a problem at this time, which was the problem of soul transfer.

Konoha's laboratory has replaced many bodies, such as the first, second, third and fourth generations of Hokage, as well as Uchiha Itachi, Nagato and so on.

But the whole process is actually a little different from what you imagine.

First, there were several generations of Hokage. They changed bodies, and it was Aoba who rescued them from the belly of the god of death. Then he chose a new clone body.

This is the most perfect way to replace. The clone has no soul. So the external soul can perfectly possess it and achieve rebirth.

The body replacement method used by Nagato, Uchiha, and Itachi is another method. And it is not a full body replacement, but a brain transplant.

That's right, it's a brain transplant surgery that focuses on the biological side. This is how the body is replaced.

The body of the Otsutsuki needs to be possessed by the soul in order to be replaced. Simply replacing the brain will cause rejection.

Obviously, the gene sequence of the Otsutsuki people is more mature and complete than that of the humans in the Ninja World. The brains of the humans in the Ninja World cannot match this level of flesh.

So the question arises: How to achieve a flawless soul transfer?

The laboratory is currently unable to do this. Or, it could have been done, but now it cannot be done.

Aoba could have used the modified Shiki Fuujin to extract the soul of the experimental subject, and then rescued him from the belly of the god of death, thus completing the soul possession.

But after he absorbed the power of the gods, the attitude of the god of death became a little complicated. The other party obviously did not want Qingye to absorb it in this way.

Even if Qingye keeps his promise and returns power to nature in the future, the reborn god of death may not be the same god of death as before.

This caused the Grim Reaper to hesitate now.

Qingye guessed that the Six Paths Sage also made a promise, like he would keep its position as a deity.

With such an attitude, Qingye dared not deal with the god of death casually. At least he did not dare to use the Demonic Sealing Technique casually.

However, it was beyond the capabilities of Konoha Laboratory to transfer a soul completely without using the Shikigami Fushin.

Although Konoha Laboratory has made great achievements in biology, medicine, ninjutsu, and sealing techniques, its accumulation in the soul is still somewhat insufficient.

In fact, there is only one person in the ninja world who is familiar with this matter, Orochimaru.