Naruto: I'm really not an evil scientist!

Based on the information I remember, a contract should be an exchange agreement with a global binding force guaranteeing its validity.

The details here need further research by Hiruko to confirm, but unfortunately he does not have a powerful summoning beast scroll.

What's even more amazing is the process of summoning spirits; the spirit beasts travel through space to fight for the user.

If you can win, fight; if you can't, you can run. Even if you get injured or your life is in danger, it's very rare.

The use of both teleportation and reverse teleportation is far too convenient, even in a world with a relatively stable spatial structure.

However, this point truly puzzled Beiruk.

What worries him even more is that the vast majority of psychic practitioners bite their fingers and use blood as a medium for communication when they are communicating with spirits.

Many psychic texts mention the use of blood as a medium.

In the long years before the rise of science, many philosophers firmly believed that blood was the vessel of the soul.

For thousands of years afterward, people still haven't figured out what the soul really is.

Is it really true, as some people say, that the weight of the soul is 27 grams?

However, whether there are any issues regarding summoning and blood-related matters in the ninja world is debatable.

Who knows what these spirit beasts want to gain from the blood?

Hiruko valued his blood highly, and he would carefully collect even items like his hair each time.

After all, once one's DNA is leaked, there are countless ways in the ninja world to clone someone exactly like oneself.

Hiruko didn't want to cause any big trouble in the future, such as being used by someone with ill intentions to create a major villain.

In the ninja world, there are quite a few ninjas who use blood to help them perform ninjutsu, but very few who must use blood as a medium to perform ninjutsu.

Blood, as a part of the human body, is an excellent chakra conductor.

Generally speaking, when inscribing sealing techniques and performing special ninjutsu, some of the materials used will contain more or less the blood of ninja beasts or even humans.

There are countless ways to stimulate potential using blood in the ninja world.

The three-colored pills of the Pig-Deer-Butterfly clan are a typical example of this kind of medicine that stimulates the body and depletes potential.

In the ninja world, secret techniques that rely on severely depleting and burning one's own blood or other parts of the body for desperate fighting are commonplace.

The principle that only those who survive are qualified to replenish their ranks applies to all realms.

Once someone is dead, they're dead; no matter how much potential they had, it was useless.

In addition, there is the infamous curse technique "Death Possession Blood" used by Hidan of the Akatsuki organization.

Using the blood of others to perform a curse is an extremely bizarre and evil form of magic.

Hiruko was not really clear about the principles of spirit communication, nor was he sure if it was related to sacrifice.

However, he saw that the Aburame clan's insect manipulation technique involved exchanging their own chakra for insects that would become their nests, thus allowing insects to help them fight.

Therefore, it can be seen that, generally speaking, unless it is as Hiruko imagines, where he is in control and his spiritualism is extremely weak.

Otherwise, it's hard to say that summoning techniques could bring forth spirit beasts without any cost.

Hiruko didn't believe that summoned beasts these days would be so easy to talk to, coming to help fight monsters without paying any price.

Moreover, high-level spirit beasts are intelligent species.

Toad Master Fukasaku, Toad Master Shima, and the slug itself are all beings who stand at the pinnacle of power in this world.

If they didn't have some kind of grievance, how could they possibly get involved in the conflicts between humans?

Even if Kaguya Otsutsuki were to be resurrected and use all of humanity for the Infinite Tsukuyomi, turning them all into White Zetsu, what would that have to do with them?

Toads will still prey on insects, and snakes will still devour frogs; why should they bother getting involved in the matter of the prophesied child?

If there is one technique that requires the offering of something to be performed, and the most famous of them all is the Corpse Demon Sealing Technique, then it is none other than the Corpse Demon Sealing Technique.

The Fourth Hokage, Minato Namikaze, used this technique, sacrificing his own soul, to summon a Shinigami of unknown origin, unleash a soul attack, and seal it away.

Spiritual communication, literally, is a technique for communicating with certain beings.

Although its principles and some phenomena are not entirely the same, conceptually they are somewhat similar.

The only thing that Hiruko couldn't understand was what the summoned beasts got from humans, or rather, what benefits they gained from the contract.

It's even possible that they don't benefit from humans, but rather directly from the rules of the world?

However, until the official contract details are seen, it's too early to say anything for sure.

Thinking of this, Hiruko carefully examined the information about summoning techniques that Minato Namikaze had given him.

These materials mostly describe how to perform psychic rituals, but do not mention the essence of psychic rituals.

At midnight, Hiruko suddenly realized that the detection devices he had set up around the village had been activated.

This is the coordinate intercolumnar cell detector he developed based on intercolumnar cells.

Hashirama cells have extremely high vitality and are easy to detect, so the main purpose of creating this detector was to monitor Obito Uchiha, that filial son.

Although there are quite a few people in Konoha who have mastered Wood Release, many clans have spent a lot of money and, after being reviewed by the Fourth Hokage Minato Namikaze, purchased the Life-Saving Agent No. 3 from Hiruko.

However, this medicine is not something that just anyone can buy.

Any family is eligible to buy it.

Take the Uchiha clan for example. Although they were among the first to get involved, they were not qualified to purchase Life No. 3.

As a Wood Release drug, Life No. 3 has extremely strict approval requirements. Purchasers must inject it on the spot and have it recorded. It is strictly forbidden to take it home and resell it, and it is also not allowed to impersonate someone else.

For this reason, not a single dose of medicine has leaked out to this day; all medicines are under the strict control of Biruhu.

Furthermore, each purchaser must inject their own genes and chakra, which are then recorded in Hiruko's database.

With these records in place, it would be incredibly easy for Hiruko to use the device to investigate Obito Uchiha, this filial son.

Minato Namikaze, through his authority to approve the purchase of Life-Giving Potion No. 3, has once again integrated himself into the core of Konoha's power structure.

The various ninja clans were overjoyed, having spent a fortune to buy the items they desired from the Fourth Hokage.

After all, what family wouldn't be happy to possess the power of the First Hokage, a power capable of pacifying a chaotic world and bringing glory to their family?

Of course, the most crucial thing is...