People are in Konoha, scientific achievements are followed by blood

The preparation of the main materials is only the first step in formulating the atavistic potion.

If you want to truly change your bloodline to achieve changes in blood traits, you must also overcome many other problems.

For example, how to make the fused blood-derived factors quickly spread to cells throughout the body?

How to safely renew your own body cells?

How to express the inherited traits after fusion?

All these problems must be solved one by one.

Some of these issues already require 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 the drug.

After all, for the atavism potion, one bad move will cause a large area of ​​cells in the body to collapse, which is a fatal thing.

If there is no human test, even if you are as bold as Yayoi, you will not dare to use it on yourself easily.

Fortunately, Yayoi also has a powerful collaborator.

In terms of human experimentation, this person is also an out-and-out authoritative figure.

He took out the psychic scroll left by Orochimaru from the box, signed a temporary psychic contract, and activated the psychic technique.

Soon, a spiritual viper appeared in front of him.

Yayoi listed her needs and exchange conditions, wrote them all on a scroll, and handed them to the psychic viper.

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

Orochimaru's reply came quickly.

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

After some bargaining, Yayoi handed over a new technology he had developed while studying White Zetsu, and obtained ten ninja experimental subjects from Uncle Snake, six of which were Sand Ninjas.

These should be the enemy ninjas captured by Orochimaru on the battlefield.

As Orochimaru's experimental subjects, these captured hostile ninjas have been tortured to the point of being reduced to human form, and their lives will be short-lived.

To make up for it, Uncle Snake took the initiative to share some of his experiences in human experiments with Yayoi.

It can be seen that Uncle Snake's attitude became much more enthusiastic after learning that Yayoi was also involved in the field of human experimentation.

Yayoi took the opportunity to ask him the key to some questions, and Uncle Snake was not shy about giving him advice.

Obviously his master Tsunade and Orochimaru are enemies, but his apprentice gets along well with him and behaves as if he is Uncle Snake's disciple.

After the contributions of these ten experimental subjects and Orochimaru's guidance.

Fifteen days later, "Type I blood inheritance fusion atavistic potion·Thousand Hands" was finally completed.

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

Just such a tube of orange juice-like potion concentrated all the techniques Yayoi has mastered at this stage, and at the same time consumed countless of his time and energy.

As long as he uses this atavistic potion, he can integrate the blood inheritance factor of the Senju clan, let his bloodline get closer to the pure Otsutsuki, and take the first step on the ladder to the gods!

That is, the first stage of the ancestral target, the source of the Senju and Uzumaki bloodlines, Asura.

One of the signs of successful atavism is that all of Yayoi's somatic cells contain the fused blood inheritance factors and have shown corresponding fusion traits.

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

Under normal circumstances, the lifespans of various cells in the human body are not consistent:

The renewal cycle of most cells is 120-200 days (such as red blood cells, liver cells), a few can survive for 10 to 20 years (such as skeletal cells, cardiac stem cells), and some live longer but do not regenerate (such as myocardium) cells, nerve cells).

The renewal of somatic cells in the atavistic stage requires the renewal of these cells that have a very long renewal cycle or even do not renew at all.

However, this also brings a problem:

If all the cells in my body, even the nerve cells that carry the body's memory, are renewed.

So, will I still be who I am now after this?

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

[A wooden ship that has been sailing for hundreds of years has been constantly repairing and replacing parts. Whenever a plank rots, it will be replaced with a new plank.

And so on, until in the end, all the planks are no longer the original ones.

So, is the final ship still the same ship as before? 】

Naturally, Yayoi will not stop her progress because of this philosophical problem.

Biological concerns were the real reason for his hesitation.

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

A person's thoughts and ideas are derived from the person's experience, and experience can be expressed as memory.

Therefore, memory is the foundation of a person.

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

It can either be carried by the neural structure of the human brain as it is on Earth;

It can also be injected into the ninja's chakra, so that the memory remains after death;

There is even the existence of the 'soul' of the deceased who has memories of his or her life, and the 'afterlife' where the soul belongs.

As a reincarnated person with memories of two lives, Yayoi's memory is undoubtedly very special, which is why he dares to do this.

He was [-]% sure that his memory was not entirely dependent on his brain.

Shaking his head, he gave up the last hesitation in his heart.

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

He first prepared the one hundred healing potions to be delivered to the third generation in this issue.

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

At this time, on the battlefield of the Kingdom of Wind, the two countries, Wind and Fire, had officially signed an armistice agreement.

The troops on both sides have completely ceased fighting, and the demand for medicines on the front line has naturally been greatly reduced.

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

Before Kushina could complain, Yayoi took the lead and asked her with a serious expression:

"Kushina, do me a favor!"

Kushina rarely saw him look so serious, and was a little uncomfortable for a while.

In order for the replacement of body cells to proceed smoothly, Yayoi prepared a growth-promoting medicine containing Yang Escape Chakra.

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

The side effect is that throughout the entire blood fusion process, he has to regularly and quantitatively inject this growth-promoting drug.

Moreover, in the middle and late stages of blood inheritance fusion, his consciousness will be in a state of suspended animation and he will be unable to control his body.

This means that he must find someone he trusts enough to take care of his body and inject himself with growth-promoting drugs and nutrients needed for life maintenance on a regular basis.

This candidate is 'Uzumaki Kushina'.