As he said this, Uchiha En's tone suddenly became very serious. Asana's expression also grew earnest when she heard him: "En, don't worry, I absolutely won't tell anyone."
Uchiha En nodded. He trusted Asana 100% as well.
"Asana, this world initially had no Chakra until one day a mysterious female Extraterrestrial Visitor ate the fruit of the Divine Tree and gained Chakra. This woman was named Ōtsutsuki Kaguya, and she is the Progenitor of Chakra."
Asana's serious expression instantly turned startled. What Uchiha En said sounded exactly like mythology and legends.
Uchiha En ignored the change in Asana's expression and continued on his own: "Ōtsutsuki Kaguya was born with the Byakugan, and after eating the Chakra Fruit, the Rinnegan appeared in the center of her forehead."
"Wait a moment, En. The Rinnegan should be the Six Paths Sage's eyes! Why did it appear on Ōtsutsuki Kaguya?" Asana interrupted Uchiha En and asked.
"That's because she later gave birth to two children, one named Otsutsuki Hagoromo and the other Otsutsuki Hamura. Both of them inherited Kaguya's Chakra and bloodline."
"And Otsutsuki Hagoromo is the Six Paths Sage! He is Kaguya's son."
Uchiha En then gave Asana a lesson on the history of the Ninja World.
Asana learned from Uchiha En that the brothers Hamura and Hagoromo fought Kaguya and sealed her on the Moon.
Then Hagoromo, the younger brother, moved his entire family, along with some clan members, to the Moon to accompany and guard his mother, while another portion remained in the Ninja World.
Meanwhile, Hamura remained in the Ninja World and began traveling around.
While traveling, Hamura spread Chakra throughout the Ninja World, and he himself was revered as the Six Paths Sage.
After a few more years, the Six Paths Sage had two sons. The eldest son, Indra, inherited the Spiritual Power representing Yin Release and the Sage Eyes, while the second son, Ashura, inherited the Physical Power representing Yang Release and the Sage Body.
The two sons became rivals due to their struggle over the Ninjutsu Sect founded by the Six Paths Sage.
This rivalry lasted for many years, continuing through the descendants of Indra and Ashura, whose Chakra also lay dormant within the bodies of their successors.
"So, the Uchiha Clan and the Senju Clan are descendants of the Six Paths Sage. No wonder they were so powerful during the Sengoku period."
"And our Hyuga Clan is descended from the Six Paths Sage's younger brother. We are all essentially from the same source. No wonder Senju Hashirama's cells could fill the defect in my genes and allow my Byakugan to evolve," Asana couldn't help but sigh after hearing this.
"Yes, bloodline is indeed very important in some respects, but it is not absolute," Uchiha En said seriously.
"What happened next? According to what you just said, neither Indra nor Ashura should have inherited the Rinnegan." Asana didn't dwell on the bloodline issue but continued to press for information regarding the Rinnegan.
"The Chakra of Indra and Ashura has always lain dormant in the bodies of their successors, manifesting every so often to fight each other.
One part of Indra and Ashura's Chakra represents Yin Release, and the other represents Yang Release. The combination of Yin and Yang can draw out the Six Paths Sage's power, leading to the Creation of All Things, and the Rinnegan will also appear."
"In other words, any member of the Uchiha Clan can possess the Rinnegan as long as they fuse the Chakra of Indra and Ashura?" Asana asked thoughtfully.
"You can't say that. Possessing their Chakra doesn't guarantee the activation of the Rinnegan, but to activate the Rinnegan, you must have the Chakra of both individuals," Uchiha En replied.
"What about the Tenseigan you mentioned earlier?"
"The Tenseigan is similar to the Rinnegan. You can understand the Tenseigan as the culmination of the Byakugan's evolution."
Asana was unable to calm down long after Uchiha En finished his narration; what she had just heard almost completely overturned everything she had ever known.
Figures like Ōtsutsuki Kaguya, the Progenitor of Ninja, and Otsutsuki Hagoromo, the Six Paths Sage, were actually real.
And the legendary Three Great Dojutsu were inextricably linked to these individuals.
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