"However, after the Chinoike Clan discovered that this plant could benefit the Ketsuryūgan's pupil power to a certain extent, they collected it extensively throughout the Ninja World, eventually leading to the extinction of this plant. Now that I think about it, the Uchiha Clan's suppression of the Chinoike Clan at the behest of the Daimyo of the Land of Lightning was probably partly due to this."
"I can restore the other ingredients in the prescription according to their properties, but this one is very difficult to find a substitute for."
Tsunade said this.
"So that's how it is."
Meikyō nodded.
"However, there are actually other ways, and it might even be possible to completely solve the problem you see, but the conditions are equally demanding."
Tsunade seemed to remember something and said.
"Oh?"
Tsunade paused for a moment, then remained silent.
What she actually meant was Hashirama Cells.
She also knew that within the village, experiments on Hashirama Cells had been conducted by Tobirama Senju, Shimura Danzō, and Orochimaru others. With the terrifying power of Hashirama Cells, let alone relieving the burden on the Mangekyō Sharingan, they might even replenish the power of Meikyō's eyes, and could even Awakening Wood Release.
However, to this day, there has not been a single publicly known successful case of transplanting Hashirama Cells in Konoha. Without exception, all the experimenters died of wood decay.
Therefore, Tsunade was not comfortable letting her most prized disciple use this thing, because even without it, Meikyō's strength was already very strong.
In Tsunade's view, even Fudō the Mangekyō Sharingan, Meikyō has already reached the threshold of Kage level strength. In the next few years, Meikyō will still be in a period of rapid growth in ninja strength and will have further improvement. At that time, it is very likely that he will reach the level of the Third Hokage and become a strong person who can be ranked in the first tier among Kage.
If one truly possesses the power of Kage Level expert, the Mangekyō Sharingan is merely an added bonus, providing a certain boost to combat strength, but it cannot bring about a qualitative change, allowing one to reach the level of the First Hokage and Madara.
Furthermore, Tsunade was somewhat resistant to the idea of transplanting her grandfather's cells into other people.
But seeing the expectant look in Meikyō's eyes, Tsunade's heart still wavered somewhat.
"Forget it, that thing is too dangerous. I'll try to solve the problem first and see if it can help you. But you should try to reduce your use of the Mangekyō Sharingan in the future. At least no matter what happens, I and Master Dan are here for you."
Tsunade sighed softly.
"I understand, Teacher Tsunade."
Seeing Tsunade's expression, Meikyō wisely refrained from asking any further questions and prepared to take his leave.
He probably already knew what Tsunade meant by the solution.
What else could it be besides Hashirama Cells?
"Etc."
Tsunade called out to Meikyō again.
"Instead of having you use the Mangekyō Sharingan again, we should find a way to increase your combat power in your normal state. Although your swordsmanship and regular Ninjutsu are very strong, there is still room for improvement in other aspects. If you can still defeat your opponents without the Mangekyō Sharingan, then it doesn't really matter whether you have the Mangekyō Sharingan or not."
Tsunade simply pulled Meikyō out of the camp and found an open space.
"With your current Chakra control and Medical Ninjutsu skills, learning this technique shouldn't be too difficult. Use your Sharingan to watch carefully."
Tsunade raised her finger and gestured towards the Meikyō before slamming her fist into the ground.
A deafening roar erupted, the ground cracked open, and a huge crater appeared.
"Super Strength, huh..."
The Ninjutsu "Super Strength" is actually quite difficult to learn.
The Uchiha Clan has produced so many masters throughout history, yet none of them have copied the Super Strength Ninjutsu. This means that simply knowing how Chakra flows is not enough to master this technique.
After Tsunade finished demonstrating, she began to explain in detail to Meikyō.
The principle behind Super Strength is actually not complicated.
The specific principles are somewhat similar to techniques such as the Mystical Palm Technique in Medical Ninjutsu.
Medical Ninjutsu like Mystical Palm Technique uses precise Chakra control to Chakra cell regeneration, while Super Strength uses Chakra to stimulate body cells, enhancing explosive power in a short period of time to achieve a significant increase in strength.
However, this could easily overload the body's muscles. If the body is not strong enough, the muscles may not be able to withstand the force before the Super Strength is even exerted.
Even if the muscles can withstand the damage, it is inevitable that some damage will occur. However, if the damage is within an acceptable range, Medical Ninjutsu can be used to repair the damaged muscles while exerting Super Strength.
It's difficult enough to treat others with Medical Ninjutsu, let alone perform such detailed treatment on one's own body, especially while maintaining Super Strength.
This requires not only excellent Chakra control and Medical Ninjutsu, but also a sufficiently keen sense of subtle perception to help one achieve this.
Those who can meet these requirements in terms of physical fitness and sensory abilities are basically families like the Senju Uzumaki clan, which inherited the Sage Body.
However, for Uchiha Meikyō, who has mastered the Transparent World, his sensory abilities are definitely sufficient. In terms of physical fitness, his years of Breathing Technique have not been in vain. Whether it is physical strength, explosive power, or other physical abilities, they far exceed the strength of ordinary ninjas.
"That's about it. With your level, I think you should be able to get a basic grasp of superhuman Super Strength within a week..."
"Boom!"
Looking at the crater in the ground that Meikyō had just punched, Tsunade's voice became somewhat stuttering.
Although the crater that Meikyō created wasn't as big or deep as Tsunade's, there's no doubt that Meikyō has now mastered the basics of the Super Strength Punch.
"Hey, you're such a genius as my disciple, it makes me, as your teacher, feel like I'm not having the experience of being a teacher at all."
Tsunade her forehead.
To be honest, she still felt it was better to teach students like Inuzuka Ryo and Aburame Nami, who were just average geniuses.
Unlike other students who can't learn no matter how much they're taught, this student doesn't learn without any experience. The teacher simply explains the principle in detail, gives a demonstration, and then the student learns it just by looking at it.
"Isn't this all thanks to Teacher Tsunade's excellent teaching!"
Meikyō smiled and flattered Tsunade.
He was naturally happy to have just learned a Ninjutsu with very practical effects.
If you combine Super Strength with swordsmanship, the power will increase significantly.
Three days later.
"Super Strength, the Senju Clan, Hashirama Cells, and... demons..."
Inside the wartime Medical Corps's laboratory, Meikyō stared intently at the three test tubes in front of her.
The three test tubes were labeled Upper Rank Two, Three, and Former Upper Moon Three, respectively, representing the blood of Hantengu, Upper Rank Two, Doma, Former Upper Akaza Upper Rank Three, and Akaza, who succeeded Akaza in the Demon Slayer World.
As the third person from Konoha who held a de facto position on the Suna front, and as Tsunade's disciple, possessing considerable Medical Ninjutsu, he was certainly qualified to use this laboratory.
In fact, this is the place where he and Tsunade previously worked together to decipher Chiyo's poison, and it has a considerable amount of professional medical equipment available for use.
Although the Transparent World plus Mangekyo and the Meikyō's sufficiently stable hands can replace top-notch facial scanners and robotic arms, there are still many functions that cannot be replaced by these devices.
"It is indeed possible to extract a very small number of Muzan's Cells from the blood of these Upper Rank Demons, transforming people into demons with Infinity lifespans and powerful self-healing abilities, but... the flaws are too great!"
Ghosts are creatures with extremely obvious strengths, but their weaknesses are equally obvious.
The mere thought that being exposed to the sun would kill him was unacceptable to Meikyō, let alone the fact that after becoming a demon, he would crave the flesh and blood of others and have a bloodthirsty impulse.
Upper Rank Demon with a sufficient amount of Muzan's Cells in their bodies, such as Akaza, can resist the urge to eat people to some extent, but it will still have an effect. Moreover, the amount of Muzan's Cells extracted from this blood is simply not comparable to that of a complete Upper Rank Demon.
Mangekyō Sharingan Meikyō, does not want to neglect one aspect for the other.
He would only consider using it if his lifespan was about to end and there were no other means to prolong it.
"Regarding the flaws of the demons, either the Blue Spider Lily or the most outstanding biological scientists are needed to fix them."
Meikyō sighed softly.
He had indeed returned to the Demon Slayer World to search for the Blue Spider Lily.
He even knew that this thing was a flower that only bloomed during one or two days a year, but knowing this was useless unless it was extremely rare. Otherwise, even if Muzan Kibutsuji and those demons couldn't find it after spending thousands of years, they would at least have obtained some relevant information.
Through normal channels, this creature would have been discovered decades later by Hashibira Inosuke and Kanzaki Aoi's descendant, Hashibira Aoba, and then its complete extinction would have been due to carelessness.
However, the Demon Slayer World has already undergone many changes due to the actions of the Meikyō. Meikyō did not even know whether Hashibira Inosuke had joined the Demon Slayer Corps during the final battle against Muzan Kibutsuji, let alone his descendants with Kanzaki Aoi decades later.
The only option now is to use other means, such as using other biological science technologies to repair the defects of this kind of creature, the ghost.
In fact, Orochimaru in the Ninja World is definitely a first-class biologist, but cooperating with Snake Uncle is somewhat dangerous.
In addition, Tsunade's abilities in this area are absolutely remarkable.
"However, the origin of demons is hard to explain, and with Teacher Tsunade's relatively upright values, she might think that these things are too evil, and like the First Hokage, she might seal or destroy these things that she considers evil."
Unless there is absolutely no one else available, giving the demon's blood to Tsunade for research is the last resort.
"It seems that I won't be able to gain any benefit from the blood of these demons for some time. So, I'll have to find another way to solve the problem of my Mangekyō Sharingan."
Meikyō stroked his chin and pondered to himself.
"It's a pity that the body of the White Zetsu I killed at the border of the Land of Rain was destroyed by the self-destruction of the Xuanyuan Group. Otherwise, that thing would be much less dangerous than the First Hokage's Cells and would be more suitable for me."
Uchiha Obito was able to survive the White Zetsu Cells with just one Mangekyō Sharingan, there's no reason why Myokyō, with two Mangekyo Meikyō, couldn't.
However, ever since that incident, the White Zetsu, knowing that Meikyō could sense their presence, have never approached Meikyō within a certain range, so Meikyō has not seen the White Zetsu since.
Aside from using these methods, the most perfect way to solve the problem of the Mangekyō Sharingan is to transplant the Mangekyō Sharingan of a close brother, which would eliminate the genetic defects of the Sharingan and even greatly enhance combat power.
But the problem is, Meikyō has no brothers...
Looking at the only two examples of people who have awakened the Eternal Mangekyō Sharingan, Uchiha Sasuke and Uchiha Madara both awakened Eternal Mangekyō Sharingan after losing their sight and transplanting their brothers' eyes. Meikyō is not sure if other people's Mangekyō Sharingan can help him awaken it.
Even if it succeeds, among Meikyō's remaining relatives, the closest blood relatives are only his cousin Uchiha Tatsu and his son Uchiha Shisui.
There's no hope for Uchiha Tatsu, and Shisui does indeed have the talent to awaken the Mangekyō Sharingan, but the problem is that Shisui is only seven or eight years old.
This approach was also ruled out in a short period of time.
Besides these, there is one last way.
To paraphrase Yoriichi Tsugikuni Yoriichi Demon Slayer World, it involves continuously strengthening Sun Breathing to enhance the Power of Yang in one's body, thereby balancing the Yin Release of the Meikyō Mangekyō Sharingan and achieving a yin-yang balance.
The underlying principle is actually the same as using White Zetsu or First Hokage cells.
But to be honest, although Meikyō has never given up on Breathing Technique over the years, his progress has slowed down after reaching his current level.
Because the efficiency of Breathing Technique is actually linked to an individual's physical fitness, unless Meikyō can train his body to an extremely strong level, he has basically reached his limit.
"Now that the battle lines have been pushed back to the border of the Land of Wind, let's see if there's an opportunity to go to Rōran again and borrow the power of the Dragon Vein once more to search other worlds and see if there's a suitable solution."
Meikyō quickly made up her mind.
Throughout the myriad realms, there are countless methods for strengthening the physical body and outstanding biological scientists.
Two weeks later.
After a difficult war with Konoha that lasted for more than three years, Sunagakure was finally driven back into the Sunagakure, and even some lands near the east side were occupied by Konoha Ninja.