After covering Uchiha Shisui with the quilt, Uchiha Yu and Miwa Masayo withdrew.

Miwa Masayo asked, "Find out why Shisui suddenly regressed to his ancestral state, meow?"

Uchiha You nodded and said, "Found it."

While teaching Uchiha Shisui training, he carefully observed the changes in Shisui's body and found the cause of the atavism phenomenon based on these changes.

"That's what I taught him. The stimulation from the previous version of the training method, coupled with a large amount of sufficient nutrition, triggered the phenomenon of blood reversion."

Miwa Masayo was shocked: "It's like this, meow, that's not right, meow."

"So many people in the Tiger Corps have learned the same training method, why haven't they had any cases of regression?"

"High-intensity training and adequate nutrition are only necessary conditions. The key is that Shisui's own talent is so strong that he can revert to his ancestral state."

"The ninja world is a world of courage. There is no need to worry about others reverting to their original form. Their talents mean that they have no chance from the beginning."

Uchiha You even pointed at his nose and said self-deprecatingly: "My talent is also not up to standard."

The tabby cat smiled. She patted the poop shoveler's fingers and comforted him, "It doesn't matter if you don't regress to your ancestors, meow. I just think you are better than your ancestors, meow."

"Well, as a ninja of the Uchiha family, my starting point is much higher than that of other Konoha ninjas. I shouldn't ask for more."

"What's more, every gift from fate has a price tag on it."

"Uchiha Shisui carries such a powerful talent, and no one knows what kind of fate awaits him."

Uchiha You thought that he had killed Shimura Danzo and decisively changed Shisui's fate, but he was not sure what consequences the change in fate would have.

But as long as you work hard to improve yourself, as your strength increases and your life level improves, your destiny will eventually be in your own hands.

Heaven moves with vigor and the gentleman should constantly strive to improve himself.

"By the way, Rika-chan. There's something I need to tell you."

"What's wrong, meow?"

"Uchiha Shisui, I want to take him as my disciple and teach him fairy arts."

"You, you don't plan to keep it a secret anymore, meow? Do you want to be wanted by both Konoha Village and Sand Village, meow?"

"Don't worry, I won't teach my real senjutsu to Shisui. I will teach him your senjutsu."

"My fairy technique, there's nothing wrong with that, but why do you have to do this, meow?"

"Indra's bloodline is too overbearing. Shisui can now meet his body's needs by taking dried fish, but as his degree of atavism increases, it will soon be unable to meet his needs."

"I know, meow. Dried fish is a condensation of natural energy. It's not 100% effective for ninjas, meow. It's a waste of too much, meow."

"Rika-chan, you're right, that's the reason. The best way to solve this problem is naturally for Shisui to learn fairy techniques himself. The effect of the dried fish can be magnified dozens of times, which is enough anyway."

"Hehe, maybe in the end we don't even need to eat dried fish. The fairy chakra condensed by Shisui himself can satisfy the consumption of atavism."

Miwa Masayo tilted his head and thought for a while, then agreed: "Okay, meow, I agree that you can accept Uchiha Shisui as your disciple, meow."

"But, I have a request, meow."

Uchiha You smiled and asked, "What's your request?"

Miwa Masayo said, "When you taught Shisui to learn senjutsu, you also taught my sister Yaeko along with you, nya."

Uchiha You asked curiously: "Rika-chan, why don't you teach Yaeko to learn fairy arts yourself?"

The tabby cat tilted its head and answered distressedly: "I taught meow, but I can't teach meow."

"Strange, didn't you teach a lot of ninja cats in the cat castle?"

"Idiot meow, they are all clan members, Yaeko is my sister, it's different meow."

"I understand. You are not afraid of other ninja cats in the Cat Castle becoming bad, but you are afraid that Yaeko will become bad and will never be able to become a cat fairy again."

"Yeah, that's it, meow."

Uchiha You patted the raccoon cat's head and agreed to her request: "No problem, Lihua-chan's request, I will definitely help you."

"I promise that Yaeko will become a cat fairy."

"Thank you, meow."

At night, Uchiha Shisui, who had slept for three hours, was woken up, had a big meal, and then was sent home to have a good rest.

Before leaving, Uchiha You instructed: "Shisui, come to my house before five o'clock tomorrow morning. I have something to teach you."

Uchiha Shisui nodded and agreed: "Brother You, I will be there on time."

As a result, before four o'clock, Uchiha Shisui was dressed and slipped to the door of Uchiha Yu's house.

Before he arrived, Shisui was frightened by the shrill howling of Miwa Masayo, so he didn't dare to knock on the door. Instead, he hid outside the courtyard gate and listened carefully to Miwa Masayo's cries.

Slowly, Shisui discovered that the cat's cry, which sounded shrill and harsh, actually had a wonderful rhythm and contained great power, which even moved his body to respond to it.

Just when Uchiha Shisui was inspired by Miwa Masayo's howling moon and couldn't help but shout at the bright moon, a big hand grabbed his neck and woke him up.

Uchiha You said with emotion: "Shisui, your talent is really too good. You can actually practice just by listening to Miwa Masayo's Howling Moon."

Uchiha Shisui asked stupidly: "Brother You, can't we practice?"

Uchiha You was amused and scolded with a smile: "Stupid Shisui, Howling Moon is a special training method for the Cat Immortal. If you, a human ninja, practice it, the result will definitely be very bad."

"Come with me into the house and wait for them to finish practicing."

As the two walked through the yard, Shisui saw the silhouettes of two cats, one big and one small, on the roof.

Miwa Masayo would call out to the moon, and Yaeko would imitate him. The sounds she had learned were very similar, but she could never learn the rhythm that shook the soul and echoed with the bright moon.

Miwa Masayo was not angry because Yaeko couldn't learn it. When Uchiha You helped her try Howling Moon, it was much more difficult than this.

So he just called out like this, allowing Yaeko to learn step by step, and slowly helping her accumulate experience.

Uchiha Shisui entered the room, and the moment he closed the door, he could no longer hear any sound from the outside world. The Howling Moon Rhythm that had been affecting him finally disappeared, making him relax a lot.

Uchiha You closed the door, walked up to Uchiha Shisui, and said solemnly: "Since you are here early, I will take this opportunity to ask you a question."

Uchiha Shisui perked up and responded, "Brother You, what do you want to ask?"

Uchiha You's expression became extremely serious, and he asked word by word: "Uchiha Shisui, are you willing to become my disciple, Uchiha You?"

"Of course!" Shisui exclaimed in surprise, and almost cheered.

But after seeing Uchiha You's serious expression, Shisui restrained his emotions and said in the most sincere and honest tone: "I am willing, Brother You, I am very willing to be your disciple."

Uchiha You's expression did not relax. He said, "Then you can perform the apprenticeship ceremony. According to my rules, you should kneel down and say 'Teacher, please accept my disciple', and then kowtow to me three times."

"yes."

Uchiha Shisui immediately knelt down, called him "Teacher", and then kowtowed seriously.

After the three kowtows were completed, Uchiha You smiled and stretched out his hand. An invisible force lifted Uchiha Shisui up and pulled him to his side.

"From today on, Shisui, you will officially become my disciple. You don't need to hide this from anyone."

"yes."

"But you must not disclose what I am going to teach you next, understand?"

"Yes, teacher."

"Tsk, it feels so awkward to hear you call me teacher... From now on, you should just call me Brother You, it sounds better."

"Hey, okay, Brother You."

"Well, you know that my contracted ninja beast is the cat sage Miwa Masayo from the Cat Castle, but do you know why she is called 'sage'?"

"Brother You, I don't know."

"Sage refers to the existence of those who practice immortal arts, and the basis of immortal arts is the immortal arts chakra formed by combining chakra with natural energy."

"The technique driven by Senjutsu Chakra is actually still Ninjutsu, but its power is extremely strong, far beyond the scope of normal Ninjutsu, so it is called Senjutsu."

"And what I want to teach you is the magic."

Uchiha Shisui opened his mouth wide, not knowing what to say for a moment.

After a long while, he asked, "Brother You, are you already an immortal?"

Uchiha Yu nodded in agreement.

"Then, besides you, are there any other immortals in the ninja world?"

"have."

Uchiha You said: "Master Jiraiya, the Toad Sage, one of the Three Ninjas of Konoha, the two Cat Sages of the Cat Castle, and among the three holy places, there are three Toad Sages in Myoboku Mountain, four Snake Sages in Ryuchi Cave, and one Slug Sage in the Wet Bone Forest."

“Why is it so little?”

"Because the practice of immortal arts is very dangerous, your life may be in danger at any time."

"Jiraiya's senjutsu is a legacy from Mount Myōboku. He barely mastered it after going through life-threatening trials. Before him, countless ninjas died because of failure in training."

"Orochimaru pursued the senjutsu of the Ryuchido Cave, but to this day he has not dared to practice it because it is too dangerous."

Uchiha Shisui thought for a moment and asked, "Isn't there any inheritance of the immortal arts of the Wet Bone Forest?"

Uchiha You replied: "Yes, our Konoha Village's first Hokage, Senju Hashirama, is the sage who masters the Wet Bone Forest Senjutsu."

In such a short period of time, after hearing the names of so many top figures at once, Uchiha Shisui has completely understood the status of fairy arts.

Naturally, he developed a great yearning for immortal arts, but he was also deeply afraid of the dangers of practicing immortal arts.

He took a deep breath, calmed himself down, and asked again: "Brother You, is the Cat Castle Magic I want to learn also very dangerous?"

Uchiha Yu grinned and said, "Not dangerous at all."

Uchiha Shisui: "Ah?"

"I'm going to tell you something confidential."

"yes!"

Uchiha You lowered his voice and said seriously: "The source of the fairy arts of the Cat Castle is me, not the ninja cats. The two cat sages learned the fairy arts from me."

Shisui was once again stunned, unable to even utter a word of emotion.

Uchiha You smiled and continued, "The reason why it is dangerous to learn the immortal arts of the three holy places is that the immortals are all aliens, not humans. They are not even mammals. The physiological differences will naturally create insurmountable dangers."

"But the magic of the cat castle is exactly the opposite. Humans may fail to practice it at most, but they will not die from practicing. On the contrary, it is very risky for ninja cats to learn magic."

"Even the cat fairy Maoyou became paralyzed due to a mistake during his training. I had to work very hard to save him."

Uchiha You reached out and patted Shisui's head, calling his soul back.

He said with a hint of boasting: "Shisui, now you know how lucky you are, do you want to learn some fairy arts?"

Uchiha Shisui came back to his senses, shook his head up and down, and said repeatedly: "Yes! Yes! I must learn it!"

"Very good." Uchiha You raised his head, looked out the door and said, "Miwa Masayo and the others' Howling Moon is over, come with me."

Before sunrise, Uchiha Yuu, Miwa Masaya, Uchiha Shisui, and Yaeko, two people and two cats, stood on the roof, facing the east and absorbing the purple air of the morning sun.

After sunrise, the two cats who had practiced all night went to rest.

Uchiha Yuu led Uchiha Shisui to practice the three basic methods. After each training, he would tell Shisui a trick. Just a trivial change, the three basic methods were divided into ninja training methods and fairy training methods.

The so-called true teachings are very applicable even in the ninja world.

When Uchiha Shisui finished practicing the three basic methods according to Uchiha You's instructions, he was shocked to find that the final feeling was so different.

After he finished practicing yesterday, his whole body was hot and he could feel the power surging from deep inside his body. The extracted chakra became unusually active.

But after completing today's training, he only felt that his body was stable, his mind was peaceful, his five senses became unusually sharp, his spirit was concentrated, and the extracted chakra was as easy as using his arms and his control increased dramatically.

Uchiha You was very satisfied with his training results and pointed out: "You should pay attention to the fact that in the practice of fairy methods in the Cat Castle, keen senses are the first key."

"When one day you feel the five-colored light spots everywhere around you, you will have the key to practicing immortal arts. Then I will teach you how to absorb natural energy."

Uchiha Shisui said happily: "Yes, Brother You, I understand."

The excited Uchiha Shisui practiced again under the care of Uchiha You. By this time, all his energy was exhausted and he became completely depressed.

Uchiha You and Shisui agreed on a training time for the next day, and then sent him home to rest.

What Shisui didn't know was that after Uchiha You returned home, he excitedly took out the scroll and recorded the optimization points he found out from the experiments on Shisui.

Through the efforts of this genius, more than fifty effective improvements were obtained within one day, and Uchiha You was so happy that he didn't know what to do.

These optimizations also have great reference value for Sanlun Yashi, and many of the optimization points can even be used directly.

After careful study, Miwa Masayo tried it a little and immediately felt obvious changes. She couldn't help but stick out her tongue and said with emotion: "You, our gains are really huge."

Uchiha Yuya has already experienced it, and the changes he felt are far stronger than those of Miwa Masayo.

After all, he and Shisui were both from the Uchiha clan, and the similarities between them far exceeded those between Ninja Cats, and every bit of change that Shisui had made with his exceptional talent had benefited him greatly.

Uchiha You said with emotion: "I suddenly realized that the immortals established the Taoism and passed down the skills, probably not to compete for the illusory luck, but to let thousands of disciples help them perfect their path."

“Even if the gap between me and my disciples is too big and I can’t directly achieve results, their attempts can serve as guideposts to help me move forward.”

"The more disciples I have, the clearer the guidance will be."

"You're going to accept lots and lots of disciples, meow?"

"Yes, I will spread the cultivation method widely in the future. It is not good to keep it to myself."

"And now?"

"Not now. We are still in the early stages of determining the direction. What we need is a genius like Shisui. If it is widely spread, it will only mess up my direction."

"Meow, so Shisui is so important, meow. We should treat Shisui better in the future. I think we owe him... meow."

Uchiha You suddenly rubbed the tabby cat's head vigorously, interrupting the tabby cat's words.

He used a lot of strength and shook it from side to side, as if he wanted to get out all the unspoken words of guilt.

Uchiha You said: "Rika-chan, you can't think like that. These optimizations of the techniques are the result of me first teaching Shisui the techniques, and then getting feedback from his practice."

"My relationship with Shisui is one of mutual benefit, not one-sided taking. There's no need to feel guilty."

"And you, Rika-chan, learned it from me. It has nothing to do with Shisui directly."

"You and I are Taoist companions. It is natural for us to support each other, and there is no need to feel any guilt."

He asked very seriously: "I have said so much, do you understand?"

Miwa Masayo took a few deep breaths before answering, "I understand, meow. I really understand."

In fact, the tabby cat didn't understand. She just knew that Uchiha You was very sensitive about owing debts, and what he feared most was owing favors to others.

He always said that this was cause and effect, that it came from the heart and acted within, and that it was the biggest and most terrifying crisis for cultivators.

Since Uchiha You is so afraid of cause and effect, even if Miwa Masayo doesn't understand, she will follow her partner's request and try her best to avoid owing anything to anyone other than him.

Uchiha You actually didn't fully understand the law of cause and effect, but he knew the saying "Mortals fear the consequences, Bodhisattvas fear the causes."

In this sentence, mortals and Bodhisattvas are in an opposing relationship, and there are many different interpretations, but when it comes to Uchiha Yu, he understands it as the opposition between short-lived people and long-lived people.

A short-lived person's life span is less than a hundred years. He cannot experience the causes and results of major developments at the same time. Therefore, he is insensitive to the causes but feels deeply about the results.

The immortals have unlimited lifespans and can witness how a great trend rises from a small beginning and eventually becomes an irresistible wave. Therefore, when they see even the smallest change, they will feel a sense of fear.

Uchiha You considered himself an immortal, but before he had accumulated enough time and experience, he was unable to truly understand the meaning of these words from an emotional point of view.

But from a cautious perspective, he decided to trust in the wisdom of his predecessors and strictly follow the relevant precepts.