Preparation of main materials is only the first step in configuring ancestral rehabilitation agents.

In order to truly change one's bloodline to achieve changes in blood-resistance traits, many other problems must be overcome.

For example, how to quickly spread the fusion of blood transient factors to cells throughout the body?

How to safely renew one's own somatic cells?

How to dominate the blood transient traits after fusion?

All of these problems must be solved one by one.

Among them, some problems already need to involve human experiments.

On earth, it is the clinical research stage of drugs. The main purpose of this stage is to verify the pharmacology and safety of drugs.

After all, for a ancestral rehabilitation agent, a bad thing will cause large-scale cell collapse in the body, which is a fatal matter.

If you don’t do a human test, even if you are as brave as Yayoi, you will not dare to use it easily on yourself.

Fortunately, Yayoi also has a collaborator with great powers.

In terms of human experiments, this person is also an absolute authoritative figure.

Take out the psychic scroll left by Orochimaru from the box, sign the temporary psychic contract, and activate the psychic technique.

Soon, a spiritual viper appeared in front of him.

Yayoi listed his needs and exchange conditions, wrote them on a scroll, and handed them over to this psychic viper.

The spiritual viper swallowed the scroll in one bite, and soon turned into smoke and disappeared in front of him.

Orochimaru's reply came very quickly.

The next day, his shadow clone came to the base directly with the "goods".

After some bargaining, Yayoi handed over a new technology he developed when he was studying Bai Jue, and obtained ten ninja experimental subjects from Uncle Snake, six of which were Sandy Ninjas.

These should be all hostile ninjas captured by Orochimaru on the battlefield.

As Orochimaru's experimental subjects, these captured hostile ninjas have been tortured to become human and will not live long.

As a make-up, Uncle Snake took the initiative to exchange some of his experiences in human experiments with Yayoi.

It can be seen that after learning that Yayoi also began to involve the field of human experiments, Uncle Snake's attitude became much more enthusiastic.

Yayoi took the opportunity to ask him some questions, and Uncle Snake did not give him any advice.

Although his master Tsunade and Orochimaru are obviously against each other, his disciple gets along well with him, and he acts like Uncle Snake's disciple.

After the contributions of these ten experimental subjects, Orochimaru's guidance was also given.

Fifteen days later, "Type I Blood Following Fusion Ancestral Rebirth Potion·Thousand Hands" was finally completed.

Shaking the orange and semi-viscous liquid in the test tube, Yayoi's eyes were a little blurred.

It is such a potion like orange juice that concentrates all the techniques that Yayoi has mastered at this stage, and also consumes countless time and energy.

As long as he uses this tube of ancestral rebirth potion, he can merge the blood succession factor of the Thousand Hand clan, let his bloodline approach the pure Otsutsuki, and take the first step to reaching the god ladder!

That is, the first stage of the goal of rebirth, the source of Thousand Hands and Vortex Bloodline, Asura.

One of the signs of success in abduction is that all Yayoi's somatic cells contain fusion blood successor factors and have shown corresponding fusion traits.

This requires two stages, namely: the blood-response factor fusion diffusion stage and the somatic cell renewal stage.

Under normal circumstances, the lifespan of various cells in the human body is inconsistent:

The renewal period of most cells is 120-200 days (such as red blood cells, liver cells), and a small number can survive for 10 years and 20 years (such as bone cells, heart stem cells), and some live longer but will not regenerate (such as cardiomyocytes, nerve cells).

Somatic cells in the atavism stage need to be renewed and replaced by cells that have a huge renewal cycle and are not even renewed.

However, this also brings a problem:

If all the cells in my body, even the nerve cells that carry human memory, have been updated.

Then, after this, am I still the me now?

As early as the 1st century AD, the Greek philosopher Plutak raised a similar question, that is, the famous "Ship of Theseus" problem:

[A wooden boat that has sailed for hundreds of years continuously repairs and replaces parts. Whenever a wooden board rots, it will be replaced with a new board.

And so on, until the end, all the boards were not the first boards.

So, is the final ship still the original ship?]

Yayoi naturally would not stop his progress because of this philosophical problem.

Biological concerns are the reason why he is really hesitant.

That is, will the renewal of nerve cells damage one's own memory.

A person’s thoughts and ideas all come from this person’s experience, and experience can be expressed as memory.

Therefore, memory is the foundation of a person.

In the Naruto world, memory is a very ambiguous thing.

It can be carried by the nerve structure of the human brain like on the earth;

It can also be injected into the chakra of the ninja, but the memory remains after death;

There are even the "souls" of the dead who remembered before his life, and the existence of the "after-death world" of the soul.

As a reincarnation with two-life memory, Yayoi's memory is undoubtedly very special, which is also his confidence in doing so.

He is 90% sure that his memory does not depend entirely on his brain.

Shaking his head, he abandoned the last little hesitation in his heart.

Before deciding to use the potion, Yayoi returned to the village from this secret base.

He first configured one hundred therapeutic agents to be delivered to the third generation in this period.

This is also the last batch of healing potions to be delivered to the battlefield.

At this time, on the battlefield of the Wind Kingdom, the Wind and Fire countries had officially signed a ceasefire agreement.

With a full armistice between the troops of both sides, the demand for drugs on the front line will naturally be greatly reduced.

After preparing the last batch of potions, Yayoi took the initiative to find Kushina Uzumaki for a long time.

Without waiting for Kushina to complain about anything, Yayoi took the lead and asked her with a serious expression:

"Kushina, do me a favor!"

Kushina rarely sees him so serious and is a little uncomfortable for a moment.

In order to smoothly carry out somatic cell renewal, Yayoi has equipped a growth-promoting agent containing Yangdu chakra.

It can renew all somatic cells in the body within fifty days, including cardiomyocytes and nerve cells that have lost their ability to renew themselves.

The side effect is that during the entire blood circulation fusion process, he has to regularly and regularly inject this growth-promoting agent.

Moreover, in the middle and late stages of blood fusion, his consciousness will be in a state of false death and cannot control his body.

This means that he must find someone he trusts to take care of his body and regularly inject growth-promoting potions and nutritional agents needed to maintain his life.

This candidate is 'Uzumaki Kushina'.
Chapter completed!