"This...isn't that inappropriate?" Shizune hesitated, but Tsunade pulled her down to sit beside her. without further ado, offering her a bowl and chopsticks.
"Don't be shy, the Hokage told you to sit down and eat," Tsunade said.
Even though it was midday, Uchiha Touhuan and Tsunade chatted and drank in the Hokage's office until the afternoon. Finally, Tsunade relented, agreeing to serve as the dean of Konoha Medical School and signing her name on the proposal.
After seeing this lady off, Uchiha Touhuan resumed his official duties.
He didn't return home until evening.
Once home, Uchiha Touhuan activated Sage Mode, and after confirming that Black was not spying, he opened the scroll given to him by the Slug Sage.
Then, Uchiha Touhuan channeled the power of his Mangekyō Sharingan and Sage Chakra into the two seals within the scroll.
After the seal was broken, the chaotic characters on the scroll began to arrange and combine, quickly transforming into clear ninja script:
[Descendant of the Uchiha clan, greetings. When you received and opened this scroll from the Slug Sage, you must have already awakened the Mangekyō Sharingan and learned Sage Mode.]
[As your ancestor, I first express my regret for the important person who passed away while you awakened the Mangekyō Sharingan, for I have felt that same way.]
[Furthermore, I must remind you not to become obsessed with power. The path we have chosen is fraught with danger. Only by maintaining absolute composure can you have a chance of survival.
This is why I did not leave the complete legacy to the clan. Most people in the clan are blindly pursuing power; I hope you will not be like that.]
"This ancestor is quite interesting." Uchiha Touhuan couldn't help but laugh when he saw the ancestral instructions at the beginning of the scroll.
His ancestor's words were anything but typical of the Uchiha clan.
[You've found this scroll, and I think you've also noticed the problem of the Mangekyō Sharingancausing blindness due to overuse. Furthermore, having trained in Sage Mode, you should have also discovered that natural energy can slowly repair the Mangekyō Sharingan damaged by the depletion of ocular power.]
[You might be wondering, can natural energy completely repair the Mangekyō Sharingan?]
[Unfortunately, it can't. To give an analogy, the Mangekyō Sharingan is like a mirror. With use, cracks will appear on the mirror.
The method for advancing the Mangekyō Sharingan recorded on the stone tablet enshrined in the clan shrine can be understood as using similar ocular power as a furnace to reforge the damaged mirror, making it stronger.
Natural energy can only act as an adhesive, delaying the time it takes for the mirror to completely shatter.]
[However, don't rush. There are ways to use natural energy to drive the evolution of the kaleidoscope, but the requirements are quite demanding. I don't know which of the three holy lands you learned your immortal techniques from.
Although the immortal forms of the three holy lands are powerful, ultimately, when the three immortals created them, they all used the body structures of slugs, toads, and snakes. This is why, even if the immortal forms of the three holy lands are cultivated to perfection, they will still leave non-human traces on the body.]
[The ultimate goal of using natural energy to advance the Mangekyō Sharingan is a Sage Technique perfectly adapted to the human body.]
[While the Sage Mode of the three great holy lands maintains a 1:1:1 ratio of natural energy, physical energy, and spiritual energy, the natural energy portion of their Sage.
Modes contains a degree of modification to the human body. This is why, after completing their Sage Mode training, the bodies of those from the three holy lands exhibit varying degrees of mutation.
Using natural energy to advance the Sharingan would actually have a counterproductive effect. Therefore, only a Sage Mode perfectly adapted to the human body can achieve this.]
[Junior, you're lucky. I've already completed this step. I'll write the training method for human Sage Mode at the end of the scroll. However, I must remind you that if your Mangekyō Sharingan doesn't possess a dojutsu like mine that can reverse one's own state, you only have one chance to try.]
[The optimal ratio of Sage Chakra for humans—body energy, spiritual energy, and natural energy—is an extremely delicate one. I cannot describe the specific figures, but I have sealed a perfect human Sage Chakra within this scroll.
However, you must proceed with extreme caution when attempting it.
If the Sage Chakra synthesized under this ratio becomes unbalanced, even the black rods of Mount Myōboku and the slug-like slime will not be able to expel the natural energy within the body.
I myself used my eye technique to conduct countless attempts before finding that point of balance before my eye power was exhausted.]
[As your ancestor, I do not wish for my descendants to attempt such a dangerous way of gaining power. However, if you need this power to protect what you cherish, then I can only wish you ultimate success.]
[Furthermore, I have also sealed a segment of my eye technique within this chakra crystal using a transcription seal. If you fail, this eye power will revert your physical state to before you attempted to synthesize Sage Chakra.
This is why I said you only have one chance.] Following this passage was a long explanation of the cultivation method for Sage Mode, a technique exclusive to humans, and a crystal storing a special Sage Chakra.
After carefully reviewing the cultivation method, Uchiha Touhuan picked up the crystal.
The moment he held the chakra crystal, Uchiha Touhuan, in Sage Mode, keenly noticed the peculiarity of this Sage Chakra.
Compared to the 1:1:1 synthesis method of the Three Great Sacred Lands, this chakra was very special. The ratio of physical energy to spiritual energy was a very unique one, while the ratio of spiritual energy to natural energy was the same.
"This ratio is... the golden ratio?" Uchiha Touhuan roughly sensed the specific numerical value of this ratio, and then suddenly realized that the ratio of the three energies in this Sage Chakra was precisely the 1:0.618 ratio known as the golden ratio in his previous life.
"No wonder the synthesis was so difficult." Uchiha Touhuan sighed, compared to the precise numerical ratios of the Three Great Sacred Lands, the ratio of this special Sage Chakra was an infinite non-repeating decimal; during synthesis, one could only rely on intuition to grasp that delicate balance.
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