Kakashi didn't want to pick up his father's sword skills again at first, and he just wanted to master the chakra as soon as possible.

But soon Kakashi discovered in his sparring with Uchiha Yuan that Uchiha Yuan's fighting style with Sharingan was based on physical arts, or a strange sword technique.

Kakashi didn't know how many times he had been knocked away by Uchiha Yuan, but he finally couldn't help it: "Yuan, why don't you use the other abilities of the Wheel Eye, just use dynamic vision?"

"Because I think that the core ability of the writing wheel eye is actually dynamic vision, and the dynamic vision will increase every time you evolve from the single hook jade, and the dynamic vision of the three hook jade writing wheel eyes will be incredibly strong.

With such a strong dynamic vision, it is very helpful for physical arts, and it is easy to see through the enemy's attacks and then make countermeasures.

Kakashi: Your physical skills are pretty good, and I think you have a family knife technique! You can learn from my fighting style and use the family knife technique with the dynamic vision of the Sharingan, so that you can use the maximum power of this Sharingan."

After listening to Uchiha Yuan's words, Kakashi fell into deep thought.

After a moment, Kakashi said, "Thank you Yuan, I'll consider your suggestion."

The Uchiha nodded and said nothing more.

Some things are enough to click on, and too much.

The next day, when the Uchiha saw Kakashi again, he had already carried with him a short knife that could conduct chakra.

After that, Uchiha Yuan accompanied Kakashi to practice purely with physical skills for a whole day.

After this day's "exchange", Uchiha Yuan basically figured out what the principle of the Hagi family's sword skills was.

To put it bluntly, the sword technique of the Hagi family is not a simple knife technique, but a type of ninjutsu.

The Hagi family's ninjutsu relies on Thunder to stimulate cell activity, which greatly increases the speed, and attaches Thunder Escape to a short knife made of chakra metal that conducts chakra, so that the body and the knife are integrated.

This ninjutsu is similar to the Thunder Chakra mode.

It's just that the ninjutsu of the Qimu family doesn't have the defense power of the Thunder Chakra mode, and the speed is not as good, but the attack power is above the Thunder Chakra mode that does not use the Hell Spike.

"Yuan, you're right, I feel that the effect of using the dynamic vision of the writing wheel eye with my family's knife technique is really good, just like the feeling of using the writing wheel eye to perfect a thousand birds."

"Chidori? What is this?" The Uchiha asked with a look of not knowing anything.

"Chidori is my own ninjutsu, I'll show you!"

After saying that, Kakashi's hands were sealed, and the Uchiha saw this and directly opened the writing wheel.

Under the observation of the writing wheel, Uchiha Yuan found that with Kakashi's seal, a ball of thunder chakra was first attached to the palm of his hand, and this part of the thunder chakra attached to Kakashi's hand tended to stabilize after the seal was completed, and the moment the spell was formed, it was like a thousand birds chirping, and the birds in the forest were all startled.

As the only self-created ninjutsu created by the copy ninja Kakashi in the original book, Chidori can be said to be the ninjutsu that is the benchmark between the early and middle stages and the Spiral Pill.

After Sasuke learned Chidori, he used the change of Thunder Escape form to develop advanced ninjutsu such as Chidori's sharp spear, Chidorig Flow, and Chidorig blade. ….

But there's one thing Uchiha Yuan hasn't thought much about.,In the original book, it was clearly stated that Chidori was a technique developed for assassination.,But the movement of this technique is so big.,How can this assassination?

Could it be an "assassination" that kills all those who see it?

The Uchiha pondered from afar, and Kakashi opened the Sharingan and rushed towards the distant rocks at high speed.

"Click~" After a crisp sound. The stones were easily crushed.

After watching Kakashi's demonstration of Chidori, the Uchiha thought to himself, "The real shortcomings of this technique have indeed been made up for by the Sharingan."

"Yuan, how is this technique of mine?" Kakashi asked toward Uchiha Yuan.

"It's pretty good in every way, and if I'm not mistaken, this technique should have both chakra nature changes and form changes.

Will be raided

The high-intensity current formed by the carat is concentrated in the hand and pierces the target with the speed of the spike, which is a genius idea."

After listening to Uchiha Yuan's exaggeration, Kakashi scratched his head a little embarrassed.

"Kakashi, since you added morphological changes and nature changes to this technique from the beginning, then I feel that this technique should have some other development directions, such as ......"

Uchiha and Kakashi talked about Sasuke's various extended changes to Chidori in the original book, and Kakashi's eyes became brighter and brighter as Uchiha Hara explained.

"Yuan, these ideas of yours are amazing! If all of these ideas can be realized, Chidori can be applied to battles in various scenarios."

"Then you should work hard! Focus on combining sword techniques and writing wheel eyes, and at the same time develop Chidori's derivative ninjutsu."

"Yuan, these ideas are what you came up with, I can't swallow them alone! So be it! I'll teach you Chidori, and we'll develop it together after you learn Chidori."

The corners of Uchiha's mouth rose slightly when he heard this, and his goal was completely achieved.

In the next half month, Uchiha Yuan focused on learning Spiral Pill and Chidori.

With Kakashi as a sparring partner, Uchiha Yuan's progress is fast, and he has mastered the most basic Spiral Pill and Chidori in half a month.

And Kakashi is worthy of his name as a genius, and in just half a month, he completed Chidori's first derivative ninjutsu - Chidori Blade.

The technique of Chidori Blade is to inject thunder chakra into the blade, which is used to enhance the lethality of the weapon, and the opponent who is stabbed will be unable to move due to paralysis, and this technique itself has the characteristics of Chidori, so it is called Chidori Blade.

With the use of the Thousand Bird Blade, the short knife that can conduct chakra can be easily cut through even steel.

Kakashi's short knife can easily split through rocks, let alone the horizontal knife in Uchiha Yuan's hand.

It is worth mentioning that when Kakashi used the Chidorigi Blade, the color of the blade was blue, which was the same color as when Sasuke used the Chidori Blade at the beginning.

And when Uchiha Yuan used the Thousand Bird Blade, the color of the blade was purple, which made Uchiha Yuan a little confused.

But he didn't care much, it was just a different color, a small problem.

That afternoon, when Uchiha Yuan and Kakashi were developing Chidori's derivative ninjutsu together, Ha Feng Shuimon suddenly appeared in front of the two.

His expression was serious, and at first glance he could tell that something was happening.

"What happened to Watergate-senpai? Is it because the situation of the war has changed?" Uchiha asked.

"Well, Hokage-sama just received the news that Shinobu is now assembling near Kikyo Mountain, and a big battle between the two villages should break out.".

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