Uchiha You said seriously: "The danger does not only come from the loss of control during the promotion process, but is also related to the bloodline of our Uchiha clan."

"When we cross two stages in succession, there is a great possibility that our Uchiha clan will be stimulated and our bloodline will be promoted."

"Even if you already have the Three Magatama Sharingan, there is a good chance that you will awaken the Mangekyō Sharingan."

Uchiha Ayumi was overjoyed: "Ah? You can awaken the Mangekyō Sharingan? This, this is great!"

Uchiha Shisui also widened his eyes. He had experienced the advancement of the Sharingan and had no doubt about Uchiha Yu's statement.

But Shisui never thought that this method could be used to break through the Mangekyō Sharingan.

Uchiha Ayumi jumped up excitedly, no longer as calm as before, shouting and yelling wildly, fully expressing his longing for the Mangekyō Sharingan.

This really annoyed Uchiha You, and he hit Bu Shi on the forehead without any hesitation, causing Bu Shi to scream.

Uchiha You scolded: "Do you think I said this is a benefit?"

"This is a very bad thing, idiot!"

"Ah?" Uchiha Bu Shi held the big bump on his forehead and asked in confusion: "Brother You, that's the Mangekyō Sharingan, a Mangekyō!"

Uchiha You said: "The Mangekyō Sharingan is of course a good thing. With your current physical fitness, once you awaken the Mangekyō, you will definitely get the same Mangekyō as the old clan leader Fugaku."

Uchiha Ayumi said loudly: "Patriarch Fugaku's eyes are also very powerful, and Susanoo is super handsome!"

Uchiha Shisui was also nodding desperately, with a longing light flashing in his eyes.

"Haha, two silly brothers." Uchiha You sneered: "Uchiha Fugaku's Mangekyō Sharingan is very powerful, and Susanoo is also very powerful, but unfortunately his Sharingan is incomplete, and every time he uses it, he is one step closer to blindness."

"Especially since Susanoo is the strongest ability of the Mangekyō Sharingan, each use of it will cause the Mangekyō Sharingan's vision to significantly deteriorate."

Uchiha You looked at his two brothers and asked, "Do you want to go blind?"

The two younger brothers shook their heads together, turning them like rattles.

Even Uchiha Ayumi was a young man under 20 years old, and a pervert with a terminal illness like Uchiha Itachi. No one wanted to become blind.

No matter how magical the Mangekyō Sharingan is, it is still an eye. In most cases, as the eyes become blind, all the abilities residing in the Sharingan will be lost.

Uchiha Shisui and Uchiha Ayumi were very young, and they had no idea how they would spend the next few decades of their lives after losing their eyes.

Uchiha Bu Shi's face turned pale at the thought of the risk of blindness.

He looked at Uchiha You pitifully and asked, "Brother You, what should I do? I don't want to become blind!"

Uchiha You said helplessly: "Try to restrain yourself. Now it all depends on your efforts and fate."

"It's best to suppress the conflict in your body and not awaken the Mangekyō Sharingan."

"Take me as an example. When you have completed the three breakthroughs in the foundation-building stage, you will awaken the Mangekyō while condensing the golden elixir, and you will get the perfect Mangekyō Sharingan in one step."

He looked at Uchiha Ayumi who was almost turning into ashes in despair, and could only comfort him: "Even if the suppression fails, there is no need to despair. There is always a way to prevent you from becoming blind."

Uchiha Shisui and Uchiha Ayumi asked at the same time: "Really?"

Uchiha You answered with certainty: "Really, and there is more than one way."

Uchiha Shisui asked curiously, "Brother You, what are they?"

Uchiha You thought for a moment and replied, "If you awaken the clan leader's Mangekyō Sharingan, the best way is to take your brother's Mangekyō Sharingan and fuse it with your own."

"When two kaleidoscopes connected by blood merge into one, they can complement each other's strengths and resolve their original flaws."

"Not only can you use your power at will without going blind, but you can also go even further in power. This kind of Mangekyō is called the 'Eternal Mangekyō Sharingan'."

"Uchiha Madara, the clan leader before Uchiha Fugaku and the first Hokage who co-founded Konoha Village, used this method."

Uchiha Ayumi and Uchiha Shisui looked at each other and shook their heads in disappointment.

Ayumi said: "Shisui and I have no brothers. In fact, there are still many brothers in the family, but it is too difficult for both brothers to awaken the Mangekyō."

Shisui said: "The key is that one of the brothers has to be sacrificed. This method is too cruel."

Uchiha You said: "Don't be disgusted, this is actually the most correct solution, and the Eternal Eye still has the potential to continue to improve."

Uchiha Shisui shook his head and said, "Brother You, if we can't do something, no matter how great our potential is, it's meaningless to me and Brother Ayumi. Is there any other way?"

Uchiha You nodded and said, "There are two very similar methods. The first is to transplant Hashirama cells, that is, to inject the active cells of the first Hokage into the body. As long as the balance between the Mangekyō and Hashirama cells is maintained, the eyes can be healed continuously, and there will be no danger of becoming blind again."

He smiled and said, "And it can also obtain Wood Release Bloodline Limit, so the effect is very good."

Uchiha Ayumi breathed a sigh of relief: "This is a good idea, I think it is completely acceptable."

Uchiha You laughed and scolded: "You are such an unpromising brother, but you are easily satisfied."

"I said, everything will not be good. Fusion of Hashirama's cells will be life-threatening. Even with the power of the Mangekyō Sharingan, it is not 100% possible to suppress Hashirama's cells."

"Once the suppression of your pupil power fails, you will be devoured by Hashirama's cells and eventually turn into a vibrant tree."

"A relatively safe option is to fuse with a White Zetsu. The effect is very similar to fusing with Hashirama's cells, and it can also obtain Wood Release Bloodline Limit."

"The price of safety is that Byakugan is hard to get, the recovery speed is not fast enough, the use of Mangekyō Sharingan must be restrained, and finally, the awakened Wood Release Bloodline Limit is not strong enough."

Uchiha You raised his index finger and said seriously: "But in my opinion, the biggest problem with these two methods is that they will destroy the integrity of the body, causing the fusionist to exhaust all his potential and never be able to make any further progress."

"Unless you can plunder someone else's Eternal Eye, or even the more powerful Samsara Eye, and place it in your own eye socket, you can use the power of others to further increase your strength."

Uchiha Shisui was very smart and he immediately understood the meaning of Uchiha You's words.

Shisui asked in surprise, "Brother You, from what I heard you mean, the Samsara Eye, one of the three major eye techniques, is related to our Uchiha clan?"

Under the surprised gazes of Ayumi and Shisui, Uchiha You nodded and said, "Yes, based on the Eternal Eye and combined with the bloodline limit of the Senju clan, the power of the universe will be born, giving birth to the Samsara Eye."

"So our Uchiha clan is able to use the Rinnegan."

Uchiha Shisui is the disciple of the Fourth Hokage Orochimaru. Following the Hokage, he knows many secrets that ordinary ninjas are completely unaware of.

He immediately thought of a person, the leader of the Hidden Rain Village, the strongest ninja in the ninja world, Nagato, who once killed nearly 40,000 ninjas from the Hidden Leaf Village, the Hidden Sand Village, and the Hidden Rock Village by himself.

It is said that he is a student of Jiraiya, one of the three ninjas of Konoha. The reason why he is so powerful is that he is a descendant of the Uzumaki clan and possesses the Rinnegan.

Shisui said stupidly, "Could it be that in addition to our Uchiha clan, the Uzumaki clan can also give birth to the Rinnegan?"

"No." Uchiha You shook his head and said, "The Uzumaki clan's talents are sealing techniques and chakra. Of course, they cannot produce any eye techniques."

"As for the eyes in Nagato's sockets, all I can say is that they did not belong to an Uzumaki, but to an Uchiha."

Uchiha Ayumi frowned and thought, but Shisui already knew who it was. He silently mouthed a name to Uchiha You: Uchiha Madara.

Uchiha You nodded, approving Shisui's guess, and his approval made Shisui gasp.

Uchiha Shisui accepted Uchiha Yu's teachings since he was very young, not only ninjutsu and immortal way, but also some knowledge of dragon slaying technique.

That knowledge had just been memorized rotely before, and Uchiha Shisui didn't understand what it meant at all.

After he became the disciple of the Fourth Hokage and came into contact with the high-level political affairs of Konoha Village, the combination of rigid theories with actual conditions made Uchiha Shisui understand a lot of things at once and matured quickly.

While Uchiha Ayumi was still confused, Uchiha Shisui not only guessed the truth, but also figured out the seriousness of the problem.

Without Uchiha Yu's reminder, Shisui shut up and said nothing, leaving Uchiha Bu Shi suspicious.

However, Bu Shi's attention soon shifted to how to suppress the urge to advance the Sharingan, and he listened carefully to Uchiha You's experience and the various techniques he summarized.

Because they have no brothers, Ayumi and Shisui cannot choose the path of the Eternal Eye, so they naturally hope to follow Uchiha Yu's path.

When his physical fitness reaches the standard and is sufficient to carry the Mangekyō Sharingan, with the help of the progress of his immortal practice, he can break through the bottleneck of the Mangekyō Sharingan in one fell swoop and obtain the Sharingan of his ancestor Indra in one step.

The Eye of Indra is even above the Eye of Eternity, and also has the potential to be further promoted to the Rinnegan. It is definitely a Mangekyō Sharingan worth looking forward to.

Both younger brothers placed their hopes on Uchiha You's methods and paths, so they listened very carefully. If it weren't for the Sharingan's ability to remember everything it saw, they would definitely take out their notebooks to take notes.

After explaining everything, Uchiha You finally added: "Every word I said today can be regarded as a secret. You two must keep it in mind, but you can't tell it to anyone."

Shisui and Ayumi looked at each other and replied at the same time: "We understand, Brother You, we will definitely keep it a secret."

Uchiha You nodded and explained briefly: "Especially the secret method I taught you today was designed specifically for you two based on my own experience and my understanding of you."

"You should have noticed just now that what I teach is different, so it must not be taught to others. If others use your two exclusive secret techniques to practice, it will definitely be useless and may even kill others."

Uchiha Bu Shi couldn't help but ask: "Brother You, the cultivation of immortality is so difficult that it requires a tailor-made cultivation method for each person. How can this be passed down?"

Uchiha You smiled and said, "Inheritance? Why can't it be inherited?"

"You two should know one thing, my way of immortality is completely different from the way of chakra's ninja. Practitioners who have successfully practiced will have a long life."

"The long lifespan I'm talking about is definitely not a hundred years, but a lifespan of up to a thousand years, like the great immortals in the three holy places."

"With enough time, you will always be able to meet disciples who are suitable for inheritance, so there is no need to worry about the issue of inheritance."

"Thousands of years of life..."

Uchiha Ayumi and Uchiha Shisui were both dumbfounded. They had never imagined that a person could live for a hundred years, let alone a thousand years.

For a moment, the two younger brothers were dumbfounded.

Because their values ​​are not influenced by the Yanhuang civilization, they have no obsession with immortality. They just find it incredible and like it instinctively.

Let’s change to the cat immortal Miwa Masaya. When he first turned to the path of immortality, he was so excited that he couldn’t sleep all night. He had a heartfelt yearning for immortality.

After checking the cultivation progress of the two younger brothers, he adjusted the system again based on the information recorded on them.

The system on the two younger brothers is the most important system created by Uchiha Yuu, and its purpose is to assist the host in practicing the immortal way.

The system has now evolved to the point where it can monitor the host's physical and mental health at all times, reminding the host of problems, key points, and hidden dangers in cultivation at any time, as well as displaying the percentage of cultivation progress.

This kind of display, which is similar to the game experience bar, is very important to Uchiha Ayumi. It lets him know that he is actually making progress and that not a single bit of his efforts are in vain when he cannot feel the progress.

Without the support of the system, he might not have been able to hold on until now and would have given up sadly before seeing the light.

The immortal way system is the key to Uchiha You's spreading of the immortal way inheritance.

As a pioneer of the immortal way in the ninja world, he extremely hopes that more people will practice the immortal way, gather everyone's inspiration and insights, and help himself continue to move forward on the unknown immortal way.

"It's almost time. The day when my teaching will be fully implemented will come soon."

Just as Uchiha You was happily calculating when to promote the system, he suddenly felt a shock in his heart. His intuition told him that his life was not in danger, but he might lose someone extremely important.

Uchiha You was shocked because the intuitive feeling was so strong, second only to the feeling when he was in life-and-death crisis.

He murmured, "Second only to life, what is so important about me that I am on the verge of losing?"

Uchiha You's brain was working frantically, checking the important items around him one by one, including his memories, and there was no possibility that they were lost.

But the intuitive sense of danger did not diminish in the slightest, and even became stronger.

Suddenly, Uchiha You had an epiphany in his mind, and he knew what was second only to his own life.

It’s Miwa Masayo.

Uchiha You couldn't help but curse himself: "Damn it, how could I forget that Miwa Masashi's transformation disaster is in these few days. It seems that it has been advanced for some reason."

"Really? Why am I thinking about all this? The most important thing right now is to find the tabby cat."

Uchiha You began to quickly check all the places where Miwa Masayo might have gone, his home in Konoha Village, the newly built villa on the banks of the Minamiga River, the Cat Castle, the Kawanokuni Dam Lake, the Nankai Volcanic Island, and the Ryuchi Cave.

These nests built by Uchiha Yuu were exactly the places he and Miwa Masayo went most often, but they could not find any trace of the tabby cats.

This inevitably made Uchiha You feel uneasy, because his intuition told him that the risk of losing Miwa Masaya was increasing.

Fortunately, he calmed himself and thought of a new way to search.

What put Miwa Masayo in danger was her transformation calamity, which must be in the form of thunder. Only through the cleansing of thunder could she rebuild her bones, muscles, fascia and meridians.

The most important thing is to correct the genes in the cells.

Only by modifying the genes in this way can the transformed human body avoid being gradually lost with the passage of time and the metabolism of body cells.

Therefore, the power of thunder and lightning must be gathering around Sanlun Yashi, and it must be accompanied by the gathering of a huge amount of natural energy from thunder spirits.

Uchiha You began to feel the thunderstorm in nature wholeheartedly, trying to find the location of Miwa Masayo from it.

Next, Uchiha You traveled at high speed to the center of each thunderstorm, looking for poor Rika-chan.

He thought that Miwa Masayo was not far from him, but he didn't expect to find anything around Konoha Village, so he had to search one by one along the center of the thunderstorm.

Uchiha You searched further and further until he arrived at the Land of Waves three days later. Only then did he feel the natural energy of wind, fire and thunder in the air, which belonged to Miwa Masayo.

Following the breath of natural energy, Uchiha You came to the island where he first encountered lightning. On the reef where he was struck by lightning, he found Miwa Masayo sitting upright.

The tabby cat sat upright with its head raised high, staring at the gray swirling clouds in the sky, with anticipation flashing in its eyes.

There is also fear of the unknown and of lightning.

Although Miwa Masayo had never experienced the thunder tribulation, she had seen with her own eyes how Uchiha Yuu overcame the tribulation.

Two years ago, on this island, Uchiha You was chased and hit by hundreds and thousands of lightning bolts, from the reefs on the seashore to the main peak of the island.

That time, when the lightning ended, Miwa Masayo went up the mountain to pick up his owner, who had almost turned into a thick piece of charcoal.

Miwa Masayo murmured, "Yuu was beaten so badly that he gained a physique that is immune to lightning."

"And I'm about to be chased and hit by lightning. I don't know if I can bear it. Also, I'm really curious about what power I will gain in the end."

Before Miwa Masayo could finish his words, a thick bolt of lightning struck from the depths of the spiral thundercloud and directly hit the tabby cat on the reef.

The transformation thunder tribulation has officially begun.