Shin Uchiha asked, "System, when can my Eternal Mangekyō Sharingan be upgraded to Rinnegan?"
"Go back to the host. Since the host lacks the necessary conditions to upgrade Rinnegan, the host's Eternal Mangekyō Sharingan cannot be upgraded to Rinnegan."
Shin Uchiha was greatly surprised when he heard the system's words, because in his impression, Madara Uchiha relied on a piece of Hashirama Senju's flesh and blood to be fused into his own body, and he was able to activate it when he was about to die of old age. He got Rinnegan, and then he exchanged his Rinnegan for Nagato, who had the bloodline of Uzumaki, and also trained Obito Uchiha to prepare for his later resurrection.
That's why Shin Uchiha was surprised, because he felt that he already had the same conditions as Madara Uchiha, and he still had a complete Sage Body, so he should have awakened faster than Madara Uchiha.
Faced with Shin Uchiha's question, the system gave him a detailed answer:
"Return to the host, because Madara Uchiha is the reincarnation of Indra, Chakra of Indra is in his body, and Hashirama Senju is the reincarnation of Asura, so in When Madara Uchiha transplanted the flesh and blood of Hashirama Senju, it was equivalent to possessing Chakra of Indra and Asura at the same time, which enabled him to awaken to the most basic Rinnegan after decades."
Shin Uchiha touched his chin. He really didn't expect that the identities of Madara Uchiha and Hashirama Senju were so complicated, and the awakening condition for Rinnegan was actually Chakra who possessed both Indra and Asura.
When he was in doubt, he asked the system, and Shin Uchiha raised his own question, "Why can only Chakra, which possesses both Indra and Asura, be able to awaken Rinnegan?"
"Return to the host, because Indra and Asura are the sons of Sage of Six Paths, and they inherited Sage of Six Paths's fairy eyes and Sage Body respectively, that is The origins of Chakra are Yin Release Chakra and Yang Release Chakra. Only by possessing both at the same time and blending them together to form Power of All Creation can Rinnegan be opened."
Shin Uchiha didn't expect that it would be so troublesome to wake up Rinnegan, so he asked impatiently, "This is too troublesome, what else can I do?"
"There are five methods, from easy to difficult, for the host to choose:"
"1. Chakra obtained from Indra and Asura will be catalyzed by the system to help the host. It is expected that Rinnegan can be opened in two years."
"Two, collect Chakra from One-Tail to Nine-Tails, and the system will help the host to integrate. It is expected that Rinnegan can be opened in three years."
"Third, capture the owner of Rinnegan - Nagato, copy and learn Dōjutsu from Rinnegan by the host, and then catalyze the integration by the system. It is expected that Rinnegan can be opened in three years."
"Four, collect Tailed Beast, use Demonic Statue of the Outer Path to absorb Nine Tailed Beasts, resurrect Ten-Tails, become Ten-Tails Jinchuriki, the host can also obtain Rinnegan"
"Fifth, plant one grain of millet in spring and harvest ten thousand grains in autumn. Plant one God Tree in Shinobi World. After getting God Tree Fruit, if the host eats it, you can directly get Nine-Tomoe Rinnegan."
Shin Uchiha looked at the methods listed in the system, and the corners of his mouth twitched fiercely. The first ones were okay, and with Shin Uchiha's strength, they could still be done, but the last two were too much.
Either set off Fourth Shinobi World War, or directly exterminate this planet, especially this last one. Even if Shin Uchiha can do it, everyone on the entire planet will be dead by then. Should Shin Uchiha be allowed to go find Ōtsutsuki Clan to play?
In fact, Shin Uchiha's current strength is already at the peak of Shinobi World. Even if Madara Uchiha is resurrected, there is nothing he can do about it. Shin Uchiha only needs to If you wish, Madara Uchiha and Obito Uchiha will never be able to collect Tailed Beast, revive Ten-Tails, and then open Infinite Tsukuyomi.
Not to mention the strength of Shin Uchiha, just say that if Shin Uchiha directly catches Three-Tails and throws it into his space, it will be done once and for all, so that Nine Tailed Beasts will never be able to gather them all.
However, Shin Uchiha cannot do this because he still has to consider the future.
In another twenty years or so, people from the Ōtsutsuki Clan may find their way to this planet. At that time, if Shin Uchiha's strength stops advancing, what will he use to resist the enemy's invasion? What's more, the current Shinobi World is actually hiding a Ōtsutsuki, but as long as he doesn't come out to cause trouble, Shin Uchiha won't bother him.
Among the several ways to turn on Rinnegan, the first one is the easiest, because around him, there are ready-made reincarnations of Indra and Asura, Sasuke Uchiha and Naruto Uzumaki. It happens that Shin Uchiha's Dōjutsu--Copying Eye. After his Mangekyō Sharingan is upgraded to Eternal Mangekyō Sharingan, he can copy Kekkei Tōta and Chakra like Indra Asura.
That is to say, Shin Uchiha already knows the reincarnations of Indra and Asura in advance. Otherwise, where would you go to find their reincarnations in the vast sea of people?
And when they become famous, even if they know that they are the reincarnations of Indra and Asura, with their strength, it will be difficult for me to control them.
Speaking of which, it was only with systematic help that his Sharingan was able to evolve into Rinnegan in just two years. If Madara Uchiha knew about it, I don't know how envious he would be. After all, he had been integrating for decades and only opened Rinnegan in his later years.
However, Shin Uchiha is not in a hurry now. After all, he just got Tsunade and went to work on other things. Don't say sorry to Tsunade. He even feels sorry for himself. Besides, before, he promised Tsunade to help her continue the bloodline of the Senju Clan. How can he go back on what he promised?
Shin Uchiha said that he was simply helping, and it was definitely not because he was coveting Tsunade's beauty.
After Shin Uchiha determined the future development direction, he went to rest with peace of mind. After all, he had worked hard all night last night. Although he was now Sage Body, he was still a little mentally exhausted. Only by resting well could he perform better during the night battle.
Therefore, on this day, only Shizune was wandering around the house bored, while Shin Uchiha and Tsunade were catching up on their sleep in the accommodation and space respectively.
And when night fell, while Tsunade was resting, Shin Uchiha also appeared in front of Tsunade and Shizune on time.
Of course, since it was already evening, Shin Uchiha, Tsunade and others did not go to the casino anymore, but came to Tavern for a drink together.