Naruto: The Strongest Sage.

In Konoha's laboratory, the Second Hokage Senju Tobirama has been studying Black Zetsu's body tissue for several months, but there is still no progress.

"I can only confirm that this thing is a product of some extremely high-level Yin-Yang escape. But our current technical means are unable to analyze it. It is too advanced, even my brother can't do it."

It's normal that Hashirama can't do it. You can see it from the original plot. This guy is very good at Wood Release, Sage Mode, and Sealing Technique. But he has rarely demonstrated Yin Release Technique.

"Can you tell me how it controls others?"

"I don't know, but I can infer that the human body itself should also be a fusion of yin and yang. It's just that the body of an ordinary person is composed of a large amount of flesh, blood, appendages, and other parts.

Black Zetsu's body is even more extreme. He is a pure Yin-Yang creation. Every cell in his body is in an unstable state. This allows his cells to simulate any form of cells."

Qingye thought for a moment and said.

"Does this mean that after entering another person's body, it can quickly simulate the body tissues and even the nervous system of that person, thereby taking over the person's body and controlling that person?"

"Yes, in theory it should be like this. This thing is very dangerous. Once it enters the body, it cannot be resisted by willpower. If the body does not have special defenses, it is almost impossible to resist.

According to previous conditions, it can even invade the brain, completely replace a person, and obtain everything from the other person."

Aoba had seen this with his own eyes. Obito, who was below the level of the God of War, was killed instantly by this move of Black Zetsu.

Rain Country Prison.

After Nagato realized that Black Zetsu had left Obito's body at some point, he immediately ordered the entire Rain Country to be on alert.

When Obito woke up briefly before, he delivered this message. But he was unable to say more because he was suppressed by the White Zetsu in his body.

Black Zetsu should have been prepared for this. There was more than one White Zetsu left in his body. Once he left, White Zetsu would be responsible for controlling Obito's body.

However, White Zetsu is not as good as Black Zetsu after all, so Obito found an opportunity. When the human world read the memories before, a lot of chaotic memories were the memories of Obito and White Zetsu.

At this moment, Xiaonan suddenly thought of something, turned around and left the prison, heading towards the secret room where Nagato was.

What did Black Zetsu want to do most after escaping? If it was a normal ninja, it would naturally escape. But Black Zetsu is not an ordinary character, it must want more. Nagato's Samsara Eye must be the first target. Because this was originally the purpose of their attack on the Rain Country.

Before the battle, Nagato was naturally not afraid of Black Zetsu. However, the full-strength battle with Uchiha Madara also made Nagato fall into a weak state again.

At this time, if Black Zetsu got close to him, it would be unthinkable. Xiaonan couldn't even imagine what would happen if Nagato was possessed by Black Zetsu.

At the same time, other members of Akatsuki also received the alarm. Although the situation within Akatsuki was complicated, they still obeyed the command when Nagato was still there.

Konan rushed to the secret room where Nagato was as soon as possible.

In the center of the secret room is a huge chair, which is equipped with a large number of life-support devices. Most of the time, Nagato sits on the chair and manipulates the Six Paths of Pain to appear.

"Nagato, you need to get out of here."

"I know, take me away." Nagato said with some difficulty.

Then, he stood up and turned on the life-support equipment. At this moment, there was a movement underground, and Black Zetsu appeared silently under Nagato's feet.

"Oh no!" Konan was shocked and shot dozens of paper darts at Black Zetsu who appeared from the ground.

However, Black Zetsu ignored the darts. These things could hurt it, but they could not cause fatal damage. It could be completely ignored. After all, the most important target at this time was Nagato.

"Shenra Tianzheng."

In his weakened state, Nagato could not control the direction of Shinra Tensei and could only release it indiscriminately at 360 degrees.

Konan, who was not far away, was also bounced away by the attack. But at the same time, Black Zetsu, who jumped out of the ground, was also bounced away by Shinra Tensei.

Like a lump of mud, it was stuck directly to the wall.

Seeing this, Xiaonan, who had stood up, also breathed a sigh of relief. The scene just now was too thrilling. If Nagato had reacted a little slower, everything would have been over now.

"Nagato, are you okay?"

Konan hurried forward and supported the staggering Nagato.

"I can still hold on. Don't worry about me, just control Black Zetsu."

Xiaonan also reacted immediately, and then directly created countless papers, completely wrapping Black Zetsu.

"The sealing team has been notified and will be able to seal it soon."

"Don't take it lightly. This thing is very dangerous. Ordinary seals may not be so effective. Contact Kamikawa Aoba. Konoha's sealing techniques are more reliable."

In fact, Nagato has never liked cooperating with Konoha. He knows about Konan's connection with Aoba, and although he didn't interfere, he didn't support it either.

Because in Nagato's heart, Konoha is the culprit of the disaster in the ninja world.

However, under the threat of Black Zetsu and Uchiha Madara, Nagato's mentality has also changed. At least on the issue of Black Zetsu and Madara, their demands are consistent with those of Konoha.

"Okay, I'll contact him right away."

It was already evening when Konoha received the news. Tsunade called Aoba and others together to discuss countermeasures.

"Just as you thought, Black Zetsu did take advantage of the situation. But no major disaster occurred and he was still under control. However, the Rain Country hopes that we can send a sealing team to seal Black Zetsu."

"This is a must. According to the agreement between Konan and I, Obito's Rinnegan belongs to Konoha. We can take it back on this trip."

Although Obito is useless, the double Kamui is still too good. Aoba sent intelligence and life potion this time to improve Nagato's combat power to the extreme. The requirement is that if Black Zetsu is captured, his Mangekyō will return to Konoha.

Although his eyes have not yet been successfully fused, he still has another pair of Mangekyō, and his combat power is still at the top of Konoha.

So this time Aoba still chose to lead the team himself. To be on the safe side, Kakashi, Namikaze Minato, Sarutobi Hiruzen all joined the team, plus two specially selected ANBU seal team members.

The team used Flying Thunder God to teleport directly to the Rain Country. During the insurance period, everyone restored their chakra to full state before entering the Rain Country.

After entering, Aoba looked up at the sky. It was not raining in the Rain Country this time.