"The first is the most common basic use of the doppelganger, which is to channel the flow and change of chakra in the body through the seal to cast."

Under everyone's gaze, Xia Yan put his hands on his chest and unhurriedly knotted the seal, so that everyone could see clearly.

Un-巳-寅.

After a simple three-stamping action.

I only heard a bang, and the smoke exploded next to Xia Yan, and a figure that looked exactly like him appeared.

This is the doppelganger created by the doppelganger technique.

Although it looks vivid, it is actually a disembodied ghost.

"That's what everyone learned in school, no problem, right?"

The little ninjas nodded their heads like chickens pecking rice.

"Although the doppelganger technique is only an E-level ninjutsu, it naturally has its important significance as one of the three ninjutsu that must be learned in the ninja school designated by the second-generation Hokage Kazuma-sama."

"In the three-body technique, the doppelganger technique represents the type of ninjutsu that releases chakra out of the body, and its ninjutsu principle can be applied to most ninjutsu, so don't underestimate this technique."

"Yes—"

The little ninjas dragged in a long voice and agreed, apparently the other teachers had also told them these words, and they were tired of hearing them.

Seeing that everyone had no doubts, Xia Yan continued to speak.

"Once we've mastered the technique, we can experiment with all sorts of variations. For example, by reducing the number of seals, we try to directly control the flow and change of chakras through our body instincts. ”

"If you reduce the number of prints one by one like this, the end point you will eventually reach...... It's Muji ninjutsu. ”

Xia Yan spread his hands as he spoke, letting everyone see that he didn't make any stamping movements.

Without warning, another cloud of smoke exploded around him, and a second doppelganger appeared.

"Wow!"

The little ninjas let out an unbelievable exclamation.

Although this was just a simple doppelganger technique, Xia Yan actually performed it without sealing, which still refreshed their three views.

Obito couldn't help but whisper: "Why haven't other teachers said this?" ”

I knew that he wouldn't have to practice those troublesome seal gestures.

Nohara Rin, who was sitting next to him, covered his mouth and smiled, and explained to Obito in a low voice: "Actually, what the teacher said in the ninjutsu class, although it was only a passing mention - because this is not the ninjutsu that we can learn now. ”

"Well, I see." Obito scratched his head with a look of pity.

It seems that his plan to learn how to hang Kakashi after Muji's surgery died before it could even begin.

Xia Yan in front of the podium continued to explain to everyone.

"Theoretically, all spells can be cast without sealing, by directly controlling the chakra."

"But obviously, it's very difficult."

"That's why people in the past have come up with various methods to assist in the casting of spells, and seals are one of them."

Xia Yan paused for a moment to let everyone digest it before continuing:

"In addition to reducing the number of stamps, we can also try to do the opposite – choose to increase the number of stamps."

"A first-class ninja will make subtle adjustments to the jutsu in this way according to the situation during the battle, such as condensing more chakra to increase the lethality of the jutsu, or further shaping the form of the jutsu."

"As the number of seals increases, the jutsu will become more and more complex, and the quantitative change will lead to the qualitative change, and eventually it will become a new type of ninjutsu. This is also the most common ninjutsu development idea. ”

"The ninjutsu that is still circulating in the ninja world today has been increased and decreased like this, and after generations of improvements, it finally became what we use now."

The little ninjas all showed expressions of sudden realization.

Grow knowledge.

It turns out that this is how the ninjutsu they used came from.

But that's the point.

Natsuhiko continued: "If we go further, we will continue to increase the number of prints, and even continue to split each seal into smaller prints – until we can no longer split it......"

At this time, if the smallest units of these "seals" are recorded on paper and other carriers, you will find an astonishing fact - they are strikingly similar to the runes used in sealing! ”

Some of the students couldn't help but gasp when they heard Xia Yan's words.

The seal used in ninjutsu, the rune used in sealing.

Two things they thought had little to do with each other, but they didn't expect to be connected here!

Xia Yan smiled and nodded, "It seems that some of the classmates already know what this means. ”

"That is to say, with the same technique, we can completely use a series of rune spells to replace the effect of sealing."

Xia Yan flipped his hand, and a rectangular piece of paper appeared between his index and middle fingers, which was filled with dense ghost drawings.

"The talisman seals used by onmyoji in the past are a good example."

As soon as the words fell, Xia Yan threw the talisman seal casually.

The talisman flew forward in a flutter, and then suddenly exploded.

After the smoke cleared, another doppelganger of Natsuhiko appeared in place.

"This is a rune seal that I imitated with reference to historical records, and a rune technique that can be used to cast a clone technique is drawn on it, and as long as it is injected into the chakra, it can achieve the same effect as an ordinary clone technique."

"That's why I call this technique the Rune Clone Technique."

At this point, there is a clone in front of Xia Yan, on the left, and on the right.

"Seal Clone Technique, No Seal Clone Technique, Rune Clone Technique," Xia Yan said softly, "These are the three uses of the Clone Technique." ”

Bang bang!

The little ninjas below suddenly burst into warm applause.

Although most people still don't quite understand what Xia Yan's actions mean, it doesn't prevent them from deciding to go home and show off to their parents: "Do you know the three uses of the doppelganger technique?" ”

After waiting for a while, Xia Yan clapped his hands and calmed everyone down, and then concluded:

"From the demonstration just now, you can know that controlling chakra through physical instinct, controlling chakra through seals, and controlling chakra through runes are actually interchangeable."

"This also means that the ninjutsu we usually use can be used with runes."

Speaking of this, Xia Yan couldn't help but sigh:

"The general ninjutsu cultivation is to constantly practice sealing and controlling chakra, so as to speed up the sealing speed and reduce the number of seals. This is essentially subtraction, constantly approaching the 'one' that controls the chakra only by the instinct of the body. ”

"The idea of the rune system is different, which is to break down the technique into runes and then master them one by one. This is essentially an addition, constantly approaching the 'wholeness' of controlling the chakra through wisdom. ”

"There is no difference between the two paths, and they may even lead to the same goal."

"Because ......"

"One is all, all is one."

Xia Yan said and spoke, only to find that the little ninjas below all had their mouths slightly open, looking like they were listening to the book of heaven, and they knew that they had spoken too deeply, and everyone couldn't understand it.

I don't have enough teaching experience.

With his finger lightly tapping his forehead, Natsuhiko organized his language and explained in a language that the little ninjas could understand:

"What I'm actually trying to say is that everybody has different talents."

"If you find that you have a mediocre talent in cultivating ordinary ninjutsu, then you might as well try another path."

"Maybe in the realm of runes, you'll find your strengths."

As for those who have no talent in either path......

Natsuhiko said that in fact, becoming a ramen apprentice is also a promising job.

The little ninjas naturally didn't know that Xia Yan had added such a sentence in his mind at the end, and many students with mediocre grades were enthusiastic.

That's right!

It's not that they don't work hard, it's that they don't choose the right path!

Maybe on a different track, they can overtake in corners and beat those geniuses in the ordinary sense!

"Teacher Xia Yan, so what you used before was actually a ninjutsu that used runes?"

At this time, Nohara Lin raised his hand again and asked.

Only then did everyone remember that Xia Yan used the doppelganger technique to demonstrate it in order to explain the principle of the technique he had just made.

Xia Yan nodded: "Yes, the projection technique I just cast is indeed a rune ninjutsu. ”

"Compared with the sealing ninjutsu, the biggest feature of rune ninjutsu is that it can construct a very complex technique."

"Because the sealing ninjutsu needs to be sealed on the spot, the forward swing needs to be taken into account...... The printing time determines that the number of prints should not be too much. ”

"For example, the famous water dragon bullet technique requires forty-four seals, in fact, there is already an element of showmanship, which is probably the limit of the number of seals."

Many students were frightened by the forty-four seals in Xia Yan's mouth and leaned back tactically.

How long does it take to seal? I'm afraid that I will be killed before the seal is finished.

"Is there really a fool who uses such a complex ninjutsu in actual combat?" Everyone couldn't help but whisper.

The corners of Natsuhiko's mouth twitched, a little pity that Kakashi didn't come to this class.

He coughed lightly twice, drawing everyone's attention back before continuing:

"And rune ninjutsu, it is generally prepared in advance to record the rune spell on a specific carrier. So as long as you can write, the chakra is enough, and the carrier carrying the runes can withstand it, then there is no problem with drawing more runes. ”

"Just like the projection technique I just cast, although it is essentially only the simplest use of the doppelganger technique and the transformation technique, with the help of runes, it can present an extremely complex scene."

"Nani? That technique just now was actually just the use of the doppelganger technique and the transformation technique? ”

The little ninjas listened to it, only understood the last sentence, and couldn't help but show an expression of disbelief.

"If that's doppelganger and transformation, then what did we learn before?"

The little ninjas began to doubt their lives again.

"Don't you understand? It's the magic runes that come into play! "Some of the students began to develop a strong interest in runes.

"Wait! The teacher seems to have said before that this is the content of our lessons after that. ”

Such shouts rang out in the classroom.

When everyone heard this, they immediately calmed down and looked at Xia Yan with expectant eyes.

Xia Yan smiled and nodded: "The basic runes required to master this technique are indeed the teaching content in the future. ”

Whether you learn or not is another question.

"Yay!"

The classroom erupted in cheers.

Many girls had a look of fascination on their faces.

They are already imagining that after learning this technique, they will write their own stories.

Sunset, who was born in a family of illusions, thought more deeply.

She was thinking about the difference between this projection and traditional illusions, and what kind of chemistry would occur if the two were superimposed.

Obito's eyes glowed, if he learned this technique, he might be able to defeat that bastard Kakashi, haha, that guy deserved not to take this class.

Although he didn't think about how this technique could be used in battle.

Ebisu, who was wearing sunglasses, didn't know what he was thinking, and suddenly had a nosebleed, and skillfully took out a red handkerchief and wiped it.

Everyone was so hungry by the big cake drawn by Xia Yan that their enthusiasm for the sealing class was unprecedentedly high, and they raised their hands to ask various questions.

Xia Yan also did not refuse to come, and answered their various questions one by one.

For example, someone asked, is there something wrong with not teaching sealing in a sealing class?

Xia Yan's answer was: "If you simply learn the sealing technique, then with the time allocated to the sealing technique, it will take about two or three years to successfully perform the simplest sealing technique, and if you learn the projection technique, then by the end of this semester, most people will be able to produce results." ”

"And I personally think that getting people to dabble in other uses of runes a little bit will help spark enthusiasm for this course."

"At the same time, the rune techniques required to learn the projection technique can also be used in various sealing techniques. When we really start to learn sealing, we will be able to get twice the result with half the effort. ”

"This is also called, and the shortest shortcut is a long detour."

The little ninjas were convinced by Xia Yan's words, and they all expressed their resolute obedience to Xia Yan's arrangement.

After that, there was still some time, so Xia Yan completed the grouping according to what he said before.

One of the episodes is Obito, who defected to the girls' camp before, and was disliked by the girls because of the results of the crane tail at this time.

Even Nohara Lin can only say that she can't help.

And the boys also refused to accept the traitor.

For a while, Obito fell into a situation where people didn't like dogs, so he could only look at Xia Yan with tears in his eyes and begging for help.

Out of bad taste, Natsuhiko finally assigned Obito to the girls' group.

Finally, Xia Yan glanced at the clock in the lower right corner of the system interface, and saw that the time was almost up, so he knocked on the podium to make everyone quiet.

"I believe you have gained a lot in this class, so today's homework is to tell the history of sealing in your own words. The focus is to analyze why the onmyoji's runic seal system has declined, and whether there is anything that can be improved, no less than 2,000 words, and the next class will be handed in. ”

I have to say that Xia Yan's time is very accurate, and the bell rings at the end of class as soon as he finishes his homework.

In his previous life, what he hated the most was that the teacher dragged the class, so he naturally wouldn't do it.

Xia Yan picked up the textbook and walked out of the classroom, and a moment later there was a mournful cry in the classroom.

Mr. Natsuhiko's class is very interesting, but there is too much homework!!

A 2,000-word paper, and it will be handed in the day after tomorrow, this is their life!

The little ninjas have mixed feelings, and they can be described as loving and hating Natsuhiko.

And Sarutobi Biwako, who was sitting in the last row, originally wanted to discuss the content of the lesson with Xia Yan after class.

As a result, as soon as she stood up, she watched Xia Yan run away like a puff of smoke in surprise, and couldn't help but shake her head and smile.