Warlock Invasion of Naruto.

Even his other incarnation, Uchiha Issei, could not find the reason for this in the Uchiha clan's records.

So Bai Yu wanted to find out the truth.

If Kakashi were to give up the Sharingan and hand it over to him, Bai Yu would naturally be very happy.

However, his decision to keep Obito's Sharingan was within Shiraha's expectations.

"Senior Baiyu, even if you and my father have a good relationship, why are you willing to go to such lengths for me? I think with my abilities, I'm afraid I can't help you at all." Kakashi remained silent for a long time before saying this. Although he knew that saying this might hurt feelings, he would be very puzzled if he didn't say it.

"Because I want to see if your sword can cut through the thorns of Konoha, I want to see just how far you can go." Bai Yu said with a smile, "Is that reason enough?"

Kakashi: "Thank you!"

"Don't thank me yet. Whether I can help you solve the Sharingan problem is still uncertain! The only seals I can think of right now that can seal the Sharingan are the Four Symbols Seal and the Five Elements Seal, but whether they will be successful and whether they will affect your chakra circulation are still unclear. In addition, I have some experiments that require your cooperation. We can consider it a win-win situation."

Bai Yu waved his hand and said.

Actually, besides Sakumo's influence, he also helped Kakashi because he liked Kakashi's character when he read the original work.

Of course, the most crucial factor is the power of emotions.

Kakashi may appear cold on the surface, but his inner self is definitely not like that.

The intense emotions he exuded at that moment had already explained everything to Bai Yu.

Only when the power of various emotions is fully charged to 100% is the first step in forging the "rules of emotion".

But this first step is very difficult.

Bai Yu needs various high-quality emotional powers.

Kakashi's current emotional power ranks among the top five of everyone Bai Yu has encountered.

His strength is clearly not even at the Kage level.

So Bai Yu wanted to see just how high Kakashi could go and how much emotional power he could generate.

"I will cooperate fully," Kakashi replied. Bai Yu treated him better than a typical master-disciple relationship, so how could he not appreciate it?

"You should rest well first. There's no rush to cooperate with the experiment. If you get hungry, just let me know, and a servant will bring you food. I'll be going now."

Bai Yu nodded slightly.

"Senior Shiraha, wait a moment," Kakashi called out hurriedly.

Bai Yu: "What's wrong? Is there anything else?"

Kakashi: "Can I see Rin?"

Bai Yu smiled slightly: "Of course you can, but she is currently unconscious, so even if you go to see her, she won't be able to give you a response."

"I want to go see her," Kakashi said firmly.

"Alright." Bai Yu stepped forward and channeled a stream of Yang Release chakra into Kakashi's body. At the same time, another stream of scorching energy entered his lower abdomen.

"Senior Shiraha, this is..." Kakashi was stunned for a moment.

"This is a top-tier breathing technique; you'll get used to it gradually." Bai Yu withdrew his hand and walked out of the room.

Kakashi regained some of his strength and followed.

After seeing that Rin's vital signs were stable in the intensive care unit of the Whirlpool Country Hospital, he finally felt relieved and returned to his room to recuperate.

......

"Lin is such a pitiful child."

Inside the room, Kushina leaned against Shiraha's chest and murmured to herself.

Rin's experience reminded her of her younger self, who went to Konoha alone and became a Jinchūriki.

Not every Jinchuriki can reconcile with a Tailed Beast.

For an ordinary girl like Rin, the fate of becoming a Jinchūriki is too heavy.

“From now on, the Uzumaki clan will be her home. She won’t be pitied; in fact, she’ll be happier than many others. Haven’t you always liked her? Why don’t you take her as your disciple?” Bai Yu hugged Kushina and said with a smile, “She was very organized when she was in school; she’ll definitely be more than capable of being your assistant.”

"Great suggestion!" Kushina's eyes lit up. "Kurama said last time that the Eight-Tails is its subordinate, so the Three-Tails must be its subordinate too. If Kurama helps, it shouldn't be difficult to get the Three-Tails and Rin to get along, right?"

“This…of course.” Nine-Tails spoke from inside the sealed space.

"Then I'll have to trouble you, Kurama." Bai Yu smiled and asked, "It shouldn't be like the Eight-Tails, refusing to give you face, right?"

"It dares?!" Nine-Tails roared in anger, then said with a hint of hesitation, "Eight-Tails' incident was an accident..."

10132318

[Chapter 144 Phoenix Chick Danzo (5100 Medium Cups)]

'The Four Symbols Seal!'

Bai Yu swiftly formed complex hand seals, and a black curse mark appeared around Kakashi's left eye.

Kakashi immediately noticed a significant change in his left eye.

After falling into a coma and then waking up, he discovered that his left eye had evolved from two tomoe to three tomoe, and the Sharingan, which was already constantly consuming energy and chakra, was now consuming even more.

After Bai Yu used the Four Symbols Seal to seal his Sharingan, the original energy consumption was reduced by more than 90%. Although it was still consuming his energy and chakra, it was within his acceptable range.

Seeing Kakashi fall silent, Bai Yu asked, "How are you feeling?"

Kakashi nodded: "I feel that the Sharingan is taking much less strain on me!"

Bai Yu smiled slightly: "I've tried several sealing techniques, but the Four Symbols Seal is still the most suitable. If I use the Five Elements Seal, it will completely seal your Sharingan, affecting your use, and it will be more troublesome to unseal it."

The Four Symbols Seal is difficult to learn, but once you do, breaking the seal is relatively simple and consumes less chakra.

You can temporarily release the seal on your Sharingan during battle, and seal it at other times. This won't affect your regular training.

"Thank you, Senior Bai Yu." Kakashi said earnestly. This time, Bai Yu not only saved his and Rin's lives, but also took Rin in and helped him resolve the hidden dangers of his Sharingan. Kakashi didn't know how to repay this kindness.

"I told you, helping you was just a spur-of-the-moment thing, so there's no need to thank me. You've been here for eight days now, and if you don't go back soon, the people of Konoha will start to worry," Bai Yu said, waving his hand. To him, what Kakashi gave him in return far outweighed what he had given.

Of course, Kakashi might think the same way as Shiraha: sometimes the amount of effort given is not determined by what is given in detail, but by what the other party needs.

"Yes." Kakashi bowed to Bai Yu. Words of thanks were too weak. Since Bai Yu wanted to see if he could change Konoha, he would show Bai Yu what he could do.

"Let's go now."

Bai Yu smiled slightly.

Kakashi hesitated for a moment before saying, "I want to go see Rin again..."

Bai Yu: "She should be training with Kushina right now. Go find her in the back mountain. I won't see you off."

"Yes." Kakashi bowed again and then left the room.

Bai Yu stood upstairs, watching Kakashi leave.

Once Kakashi had disappeared from his sight, Shiraha returned to the laboratory.

The computer contains a large amount of experimental data about Kakashi's Sharingan in his left eye.

If Rin Nohara's medical ninjutsu was able to successfully transplant the Sharingan into Kakashi on the battlefield, then this level of surgery would be a piece of cake for Shiraha.

Three days ago, Kakashi's body fully recovered, so Hakuba removed his Sharingan using medical ninjutsu and then soaked it in a special solution for cell research.

After that, he transplanted the Sharingan back into Kakashi's eye socket.

The Sharingan of the Uchiha clan has five special meridians in its eye socket compared to those of a normal person, and these meridians are the key to transporting chakra.

The conventional transplantation method involves combining the five extra meridians from the Sharingan and then transplanting them into a normal person's eye socket.

Ninjas without Uchiha blood cannot freely open and close their Sharingan. Therefore, even if an Uchiha clansman is killed by an enemy, as long as they close their Sharingan before death, the enemy who takes their body will not be able to open their Sharingan even if they transplant their eyeballs.

This is also why the Uchiha clan did not have the 'Caged Bird Seal' like the Hyuga clan, but the Sharingan did not leak out.

Of course, there is another aspect: eye transplantation involves very advanced medical ninjutsu. Konoha's medical ninjutsu is the best in the entire ninja world. Just because they can perform eye transplantation does not mean that other villages can do it as well.

The Second Hokage, Tobirama Senju, once researched the Sharingan of the Uchiha clan, but at that time, his experimental skills were probably more advanced than his medical ninjutsu skills.

The person who truly brought medical ninjutsu to a whole new level was Tsunade.

Therefore, the fact that the Sharingan has five special meridians that are different from ordinary eyes is something that not only the Second Hokage Tobirama Senju didn't know, but probably even the Uchiha clan members themselves didn't know.

The five special meridians were barely able to be combined, but they would inevitably be difficult to control, and the continuous consumption of chakra and energy would also inevitably lead to hidden dangers.

Bai Yu currently has no way to help Kakashi resolve this hidden danger.

There are currently two solutions. One is to transplant Uchiha bloodline into Kakashi, making him a Uchiha ninja in some sense, so that he can naturally adapt to the Sharingan.

Another method is to transplant interstitial cells.

When Bai Yu obtained the fourth-level bloodline source and advanced to the first-level Summoning Sorcerer, he awakened the double-tomoe Sharingan. This means that the Uchiha clan's bloodline contains the power of the "Divine Tree" bloodline, which is the same as or has similar power to Hashirama's cells.

Since the Sharingan cannot be turned off, it will continuously consume energy and chakra. If it cannot be controlled freely, improving physical fitness and chakra can obviously be considered as solving this problem from another aspect.

However, Shiraha's cell transplantation experiment is not yet at a perfect level, and Kakashi is not Nawaki.

The rope tree itself is a descendant of the first generation, and its cells have a certain compatibility with the first generation cells. Therefore, after weakening the activity of the first generation cells, the two are fused together, with the rope tree cells as the main component, to cultivate special first generation cells.

As soon as Kakashi's cells were placed together with the First Hokage's cells, they were devoured by the First Hokage's cells. Even the weakened First Hokage's cells couldn't withstand it. If Bai Yu were to transplant First Hokage's cells into him, he would be harming him.

"Why is Kakashi's three-tomoe Sharingan so special? Its eye power is ridiculously strong... His Sharingan comes from Obito, but Obito's talent was mediocre, no, Obito..."

Bai Yu stared at the complex data on the computer screen, lost in thought, before suddenly realizing something.

According to Kakashi, Obito awakened the two-tomoe Sharingan directly during the battle, skipping the one-tomoe stage.

Therefore, Obito's bloodline purity should be very high.

"After the Sharingan was transplanted, Kakashi was able to advance in rank even though he didn't have Uchiha blood."

"The person wearing the vortex mask that Kodama saw should be Madara's subordinate who fought Kushina last time, but judging from his shout, he looks too much like Obito!"

"Given Obito's feelings for Rin, it wouldn't be an exaggeration to say that he would have gone straight from the two tomoe to the Mangekyou Sharingan upon seeing Rin stabbed to death by his good friend Kakashi."

"Could it be that Obito really didn't die?"

"Looks like I'll have to find an opportunity to try. I wonder what Madara is up to?"

Bai Yu repeatedly observed the experimental data. If his guess was correct, then there was an explanation for Kakashi's eye power problem.

That is, Kakashi awakened the Mangekyou Sharingan, but because his ocular power was insufficient, or rather because he did not have the Uchiha bloodline, the Mangekyou Sharingan automatically degenerated into the three-tomoe Sharingan.

After all, according to the information obtained from the incarnation of Uchiha Issei and Chiho, the Uchiha clan can use the Sharingan for a long time and freely turn it on and off, but there has never been any news that a member of the Uchiha clan can use the Mangekyou Sharingan for a long time.