Natsuhiko got this technique from Mito yesterday and has seen it many times.

However, to his surprise, the cultivation method of this Yin Seal was actually incomplete.

It's not that Mito is hiding something from him, it's that the Yin Seal is already incomplete.

According to the records on the scroll, the Yin Seal, as a mystery passed down from generation to generation by the Vortex Clan, has a very long history, and can even be traced back to the era of the Six Dao Immortals.

And unlike the simple chakra power bank in Xia Yan's imagination, the Yin Seal is based on the stored chakra, in fact, it has a lot of wonderful uses in theory, and it has a complete ninjutsu system.

However, like the history of the rune system, the inheritance of the Yin Seal has also experienced many twists and turns, and there have been several losses and faults.

So now, the only thing that is relatively completely recorded on this scroll is the two functions of storing chakra and stimulating the body's activity to maintain youth.

The rest of the functions are just a few words and completely disorganized.

At the same time, what made Xia Yan a little concerned was that in the written records on the scroll, the word "Baihao" appeared many times.

This actually refers to the fact that a person who has completely mastered the Yin Seal can have a chakra amount and combat power equivalent to the level of a hundred heroes—it is estimated that the heroes have also felt very embarrassed when they hear it.

Even the Yin Seal system was in the early days, in fact, it was directly called the technique of Baihao!

And the diamond-shaped mark formed by the Yin Seal is also known as the Seal of Baihao!

It's just that because this technique has been lost, almost only the function of sealing and storing chakra is left, and it can no longer afford the name of "Baihao", so it is rarely called so.

When Xia Yan saw this, he finally figured out a question.

In the future, Tsunade will obviously develop the art of Baihao, but in the Boruto legend, Sakura claims that the art of Baihao is a very ancient ninjutsu.

Naturally, this is not Sakura secretly rubbing to hint at Tsunade's age.

It is more likely that Tsunade later developed the Yin Seal from the direction of medical ninjutsu, and also invented the S-class medical ninjutsu of Creation Regeneration, which can greatly exert the power of the Yin Seal in actual combat.

In the case of thinking that he has completed the Yin Seal, Tsunade will confidently take out the name of Baihao's technique and use it again.

However, it is obvious that Tsunade's Baihao technique is probably still much inferior to the original Baihao technique.

And Xia Yan finally understood why Mito-sensei would so easily teach him the Yin Seal, the most valuable ninjutsu of the Uzumaki clan.

He even made him aware of the shortcomings of his insufficient chakra amount through discussion in advance, which increased the attractiveness of the Yin Seal.

Now it seems that she actually wants to use Xia Yan's unique thinking and powerful ninjutsu development ability to complete the Yin Seal to a certain extent.

In this way, Jiu Sinai, who studied the Yin Seal with Xia Yan, would naturally benefit a lot.

So on the surface, Xia Yan prostituted to the Yin Seal in vain, but in fact, Mito was also prostituting him in vain.

It's just that developing his own Baihao technique is also a very attractive thing for Xia Yan, so he can only obediently swallow the bait thrown by Mito.

After all, in fact, a long time ago, the "battery" function of the Yin Seal had an irreplaceable role in Xia Yan's Chakra God Plan.

Even the chakra capacitor developed by Xia Yan was actually just a by-product of Xia Yan's previous process of sealing the Copycat Yin.

It's a pity that the nature of the chakra after injecting the chakra capacitor will still change to a certain extent, so it can't be injected into people's bodies in reverse, and can only be used to drive those rune creations.

Otherwise, there was no need to wait for the Yin Seal to be learned, and the problem of Xia Yan's lack of blue would have been solved long ago.

Therefore, for the Yin Seal, Xia Yan has actually been greedy for a long time, and he has already had a series of application plans a long time ago.

It's like mixing a whole bunch of flavor dishes and waiting for the dumplings to be served.

At the same time, the Yin Seal automatically and precisely releases a small amount of chakra to stimulate the cells of the whole body and maintain the youthfulness of the body through the rune technique, which also makes Xia Yan very visual.

Because this is actually very similar to his idea of casting rune ninjutsu through his brain, he got rid of the shackles of sealing and manipulated his body through rune techniques.

It's just that the carrier of the brain is the chakra metal ball, and the carrier of the yin seal is the caster's body and chakra.

Moreover, the wisdom brain can only operate by providing chakras from Natsuhiko, while the Yin Seal can operate by consuming the stored chakra.

Therefore, Xia Yan's learning of the Yin Seal, in addition to adding a backup power supply to his brain, also has a great reference role for Xia Yan in terms of application.

At least, his Chakra brain upgrade work, which had been stagnant for a long time, had a new breakthrough direction.

However, these things are still in the air for the time being.

Because although the final diamond-shaped mark formed by the Yin Seal was on the forehead, the rune spells that needed to be formed in the body were all over the body.

Therefore, in addition to sealing, you also need advanced medical ninjutsu knowledge, a full understanding of all parts of the body, and a medical ninjutsu that can be repaired immediately in case of an accident in order to reach the threshold of learning Yin seals.

Even Natsuhiko doesn't actually know much about medical ninjutsu, so he has to learn it from scratch.

So in the following time, Xia Yan first revisited the Yin Seal for Jiu Sinai a little, and then opened another scroll and conjured up a mountain-like medical ninjutsu book.

This is the medical ninjutsu material that Mito Teacher specially prepared for them.

And that's just part of it......

“……”

The two glanced at each other tacitly, and both showed distressed expressions.

……

A few days later, on the playground of the ninja school.

Obito's Year A class is taking a physical arts class.

Towards the end of the semester, the focus of this course is also more on allowing students to practice and learn from each other and increase their combat experience.

After each student is named by the teacher, they will go on the field to practice physical skills with their opponents who are also called by name.

"Konoha Whirlwind!"

I saw a girl's figure on the field flicker, and instantly came to a tall boy, and kicked the opponent directly away with a volley kick.

The sharp and decisive action made the onlookers inexplicably have a sense of déjà vu, and they all looked at Maitkai who was nodding on the side.

Why is Lynn's combat moves becoming more and more similar to Akai's recently?

Don't......

The students, who didn't know the function of Xia Yan's training clothes, couldn't help but muttered in their hearts.

But the question is, why is Liantu's combat movements exactly the same as Akai's?

Don't......

Isn't your circle a bit messy?

And the physical arts teacher, who knows the inside story, is both relieved and helplessly praised:

"Very good, Lynn you have made a lot of progress recently, if you keep it up, you should be able to enter the top five of the class by the end of the semester."

"And the rest of you, learn a lot from Lynn!"

Although the physical arts teacher used Lin as a child from the next door to inspire other students, he also knew that Lin's strength was not something that these students could replicate now.

After all, the fundamental reason for her rapid growth in strength is the training uniform developed by Xia Yan's guy.

Of course, Lynn's own daily hard work cannot be ignored.

To put it simply, it's technology and hard work.

Therefore, the physical arts teacher is inevitably a little complicated.

Although he was also pleased with Rin's physical improvements, these improvements could only be attributed to the sealing teacher, not him, the physical arts teacher, which also made him a little embarrassed.

Not to mention that he heard that this training uniform would be officially popularized in schools in the next school year, which made the physical arts teacher inevitably a little worried.

Fear that your role will be completely replaced by your training clothes.

I feel that since Xia Yan came to school, this teacher's job has become more and more complicated.

He thought he would do this job until he retired, but now he is not so certain......

After shaking his head and throwing the distracting thoughts out of his mind, the physical arts teacher picked up the form and clicked on the names of the next group of students who were on the field to practice.

Kakashi Hagi right...... Uchiha Obito. ”

The physical skills teacher's voice froze slightly, and then looked at Obito Dao helplessly:

"Obito, did you decide to abstain this time?"

(End of chapter)