As soon as Xia Yan got home, he walked straight to the study.

Although it is almost the New Year, the three little ones in the study are still conscientiously carrying out research work.

Three-year-old child labor, 16-hour workday, all year round, no pay.

The capitalists wept when they saw it.

Xia Yan also asked himself from time to time:

Maybe the ninja world won't die out in the future, but is it all worth it?

However, at this time, Xia Yan didn't care about them, and after casually saying hello, he sat down in his seat and put a scroll on the table.

This is a ninjutsu scroll that the three generations just copied from the Book of Seals with a special technique.

Although the ideas that Xia Yan and the three generations said were not lying, the art of spiritualization actually had a more important meaning to him.

And now is the time to test his idea.

Xia Yan took a deep breath and spread out the scroll.

【Spiritualization Technique】

[Inventor: Unknown (Note: Don't ask, it's not Lord Mojima-Mitsuri-Midai Meru)]

[Ninjutsu principle: ......]

Xia Yan carefully read the words and meridian diagrams written on it, up and down a few times, before exhaling lightly.

Sure enough, it was the same as he thought.

Although it seems that the eight poles can't be hit, the principle of the Spiritualization Technique has a lot of similarities with the Shadow Clone Technique.

Both are to lodge spirits on the chakra and then release the chakra to the outside world.

It's just that the shadow clone technique turns the chakra, which is partially retained, into the form of a physical clone.

And the art of spiritualization is to transform the chakra, which is housed with all the spirits, into the form of a spirit body.

Yes, the spirits conjured by the Spiritualization Technique are essentially no different from various clones, and they are all carriers of consciousness conjured up by Chakra.

Because in the laws of the ninja world, a simple soul is of no use.

It is only with the chakra as a vehicle that the soul gains the ability to interfere with the outside world.

However, unlike the Spiritualization Technique, which is actively activated, the Shadow Clone's Spiritual Attachment is more like calling a built-in function hidden deep in the chakra, which does not need to be controlled, and cannot be controlled.

Over the years, Xia Yan has continued to deduce the culture of the shadow clone through the prototype, and has now reached 99% progress.

And the one percent that has not been conquered for a long time is the content of this part.

After all, Xia Yan's rune ninjutsu is relatively rigid, and he can't use the power of my thinking to mobilize that "built-in function" like a real person.

So this means that Xia Yan still has to code this "function" for himself in order to realize the complete conformity of the shadow clone technique.

Because of this, the rune ninjutsu that Xia Yan developed based on the shadow clone before, the shadow puppet technique and the flower clone technique, have no self-awareness.

It can be said that he deliberately avoided the content of this part.

Even Xia Yan guessed that even the inventor of the shadow clone technique, the great ninjutsu inventor Senjutsu Senjutsu, probably only found a way to call this function, and did not really understand the principle.

But obviously, the content of this part is probably the most valuable part of the shadow clone technique.

After all, this method of dividing the spirit, soul or will on the chakra and dividing it into the body made Xia Yan can't help but think of the source of the chakra, the unique ability of the big barrel wood clan - "wedge"!

The so-called wedge refers to a black diamond-shaped imprint formed by the Otsuki clan compressing their consciousness and body data into the chakra and punching it into the body of others.

And those who are wedged are called instruments by them.

Once the Otsuki clan dies, the wedge they left behind will begin to thaw, allowing the body of the "instrument" to be gradually replaced by the data of the Otsuki clan itself, and finally achieve the purpose of resurrection.

Therefore, as long as there is a wedge, the Otsuki clan can continue to resurrect and become an existence beyond death.

Needless to say, this soul function, which is rooted in the bottom layer of chakra, is one of the knowledge that involves the nature of chakra.

For Natsuhiko, who aspires to become the god of Chakra, it is an unavoidable problem.

And according to what he had just checked, as he had guessed, the Spiritualization Technique, which required the complete stripping of the spirit from the physical body, was not a simple invocation of the soul function like the Shadow Clone Technique, but had a more in-depth application.

Although it is still 108,000 miles away from clarifying its essence, it can be regarded as a good start and points out the direction for Xia Yan.

Coupled with the fact that the three generations gave him a lot of information about the soul realm, it should be enough for him to gain a lot.

At least he was confident that he would be able to complete the complete conformity of the shadow clone technique in a few months.

Of course, the Spiritualization Technique itself is also a very useful ninjutsu, and Xia Yan will not miss it.

In the original work, Kato Tsukato showed a variety of abilities such as long-distance perception, high-speed flight, body control, creation of mental space, and transmission of chakra in the fourth ninja war.

Almost every ability can be used in Xia Yan's hands.

Especially the usage of the chakra, which also allowed Xia Yan to find hope to make up for his lack of chakra.

Anyway, Jiu Sinai Chakra can't be used up, just so that she can replenish her demons.

Therefore, it is not difficult to see that the art of spiritualization, like the art of shadow clone, is also a ninjutsu with great potential.

And this is also the reason why Xia Yan finally gave up Rashomon, which could be used to collect the wool of the Difu, and the Flying Thunder God Technique, which was so handsome that he had no friends.

However, the disadvantages of this technique are also obvious.

In addition to the fact that the main body is defenseless and easy to overturn, like the shadow clone technique, this technique will continue to consume chakra in the process of use.

- And the consumption rate is much higher than that of the shadow clone.

What's even more terrifying is that when the shadow clone technique chakra is consumed enough to maintain the body, the shadow clone will disappear and return to its original body.

In order to better kill and injure the enemy and avoid counter-injuring the body, the spirit of the spirit is lodged on the chakra, and the connection with the physical body is minimized, so it loses the service of automatically returning to the city.

This also means that if the caster's soul has not returned to its original body when the chakra is used up, it will probably go straight from a living soul to a dead soul.

Therefore, when ninjas use the Spiritualization Technique, they must always pay attention to the remaining amount of chakra to ensure that enough chakra is returned to the body.

Therefore, Xia Yan really wanted to give a suggestion to the other traversers, if they kept their phones out of battery in their previous lives, then try not to learn this technique.

And this is also the reason why the art of spiritualization is obviously comprehensive and powerful, but few people are willing to learn it.

Before, Xia Yan was a little hesitant and didn't want to choose this ninjutsu, and he had similar thoughts.

High returns come with high risks.

Those who play with the soul will be abandoned by the soul.

He was afraid that he would be like Kato and die in waves;

I'm afraid that like Orochimaru, I'll make myself no one and no ghost.

So Xia Yan, who originally planned to develop slowly, actually wanted to accumulate a few more years of experience before starting to study this field.

However, after talking to Mito, a sense of urgency rose in his heart.

Although there is no Naruto, Asura's chakra will also find someone else to reincarnate.

But without the protagonist's aura, dried bamboo shoots, barbecued pork or braised eggs, there is a question mark over whether they can save the ninja world.

So just in case, Xia Yan still decided to improve his strength as much as possible, and don't wait for the future to regret it.

Alas, it looks like next year's research will be even more onerous.

After Xia Yan tapped the table and calculated everything, he suddenly looked at the three little ones opposite.

"You three, come here."

The three little ones who were working hard were stunned for a moment, and then suddenly showed a happy expression and ran over.

"Ontology, have you finally found out in your conscience that you are going to give us annual leave?"

The three little ones said excitedly in unison.

Xia Yan's expression is strange, why does the shadow clone need to take annual leave?

The three little ones dare to take annual leave now, and Xia Yan doesn't dare to think about what he wants to do in the future.

What's more, he was ready to tell them that he had given them a full plan for the coming year's work.

Now, it seems to be a little difficult to speak.

Fortunately, Xia Yan suddenly had a flash of inspiration, thinking of the geniuses who gave children exercise books in his previous life.

So he smiled and said to the three little ones with anticipation on his face:

"Actually, I have a New Year's gift for you......"