Reborn Naruto, I rolled my eyes to the sky

Although the theory has been improved a lot during the discussion among several people, there is still a long way to go to actually realize this ninjutsu, and it is even more difficult to make it a ninjutsu that can be used in actual combat.

However, for Minato and the rest of us, time was not a problem. After all, the three of us were less than twelve years old. It was already good enough for an ordinary ninja to graduate from a ninja school at this age. How could they have the ability to develop ninjutsu on their own?

Of course, in addition to developing the Rasengan ninjutsu with Minato and Orochimaru, I also did not neglect my own practice. With the Twelve Earthly Branches Fundamental Seals as the foundation, I naturally practiced diligently every day to comprehensively improve and purify my essence, energy, and spirit.

The Eight Gates Technique was originally a forbidden technique of Konoha that could instantly unleash one's physical strength and chakra. However, after my improvements, although the instantaneous destructive power of the Eight Gates Technique was reduced, it has become a method that can subtly improve physical strength.

As for the fighting methods, apart from the ninjutsu and taijutsu I learned in Konoha School, the Hyuga Gentle Fist and Goju-ryu Fist that I mainly practiced, and the illusion of five senses deprivation that I just learned before going to the border, I have also learned a few tricks from Jiraiya and Tsunade in the past few days.

Although Jiraiya is also an elite ninja who is proficient in both ninjutsu and taijutsu, he is relatively more proficient in ninjutsu and senjutsu, while Tsunade is the strongest in taijutsu among the three ninjas.

However, I am not very interested in the ninjutsu and physical techniques commonly practiced in the ninja world. After all, most ninjutsu were developed for combat and to dominate with destructive power.

As for me, with the immortality of the Goddess of the Rabbit, Kaguya Ōtsutsuki, in front of me, the eternal soul of the Six Paths Sage in the Ninja World behind me, and the three sages in the three holy places with a lifespan of more than a thousand years, my goal has never been to compete with others, but to truly improve the essence of my own life in order to achieve the ultimate state of transcendence.

Therefore, from the time I was born until now, my planning for my own path of cultivation has been based on this, mainly focusing on improving my spirit, and I only have a few abilities that I can use for combat.

Although Tsunade also possesses many S-level ninjutsu and can teach me various powerful ninjutsu and forbidden techniques, I am only interested in a few of them that can improve the essence of life. I no longer have any need for simple fighting and killing techniques.

What I asked Tsunade about today was her signature ninjutsu - Yin Seal. This technique does not directly improve the ninja's body, chakra and spirit, but simply stores the chakra practiced in daily life, and can burst out huge amounts of chakra in battle.

"The Yin Sealing Technique is actually a sealing technique derived from the Uzumaki clan. As you know, its main function is to seal and store your usual chakra so that you can burst out stronger chakra than usual during battle."

Tsunade taught me: "Theoretically, there is no upper limit to the Yin Seal. Theoretically, you can store and seal chakra for ten or even twenty years, becoming a being comparable to the tailed beasts, but in fact, your physical strength determines your ability to bear it."

"Most ninjas simply cannot withstand twice their own chakra, so not all ninjas are suitable for practicing this ninjutsu."

Tsunade glanced at me and said, "Although the Hyuga clan is not known for their physical fitness, with your abilities, you can probably withstand five times your own chakra. After training, the effect should be good."

I naturally agree with Tsunade's statement, but I have my own ideas about this ninjutsu. In fact, I have had some vague ideas about it since I was born.

In most cultivation and supernatural power systems, energy is stored in the body in a certain way, but it is different in the world of Naruto. The chakra of the ninja world is directly extracted from physical cells and spiritual energy. It can be used and taken at the same time, and there is no such thing as storage.

So for ninjas, chakra is inextricably linked to physical strength and eye strength. Even chakra is not a long-lasting form of energy, but just a temporary aggregate. So compared to my impression of cultivation and magic, the sustainability of ninjas is indeed much worse.

Of course, this has a lot to do with the nature of chakra. The Yin Seal is an attempt by the ninjas to store energy, but as Tsunade said, the storage capacity of chakra is closely related to a person's physical fitness. It cannot be stored indefinitely, or even can only be stored once or twice, which has no practical significance.

My advantages in this area are very obvious. First of all, based on the twelve Earthly Branches' fundamental seals and the Eight Gates Ninjutsu, my physical strength is indeed much higher.

What's more important is that my chakra is essentially different from the chakras of other ninjas. As I have painstakingly studied the fundamental seals of the Twelve Earthly Branches, I have integrated natural energy into my chakra practice.

Compared to the chakra that is completely extracted from the body's energy and spiritual power and has a tendency to return to the body's instincts, my chakra has a tendency to aggregate just like in cultivation. This is exactly the basis for the pill-making method that I want to develop with the Yin Sealing Technique.