Because the Uchiha were Indra's descendants!
And the Senju were Asura's descendants!
Tracing their lineage back to its very beginning, both the Uchiha and Senju clans were descendants of the Sage of Six Paths!!
Tobirama Senju was undoubtedly excited by this discovery. To him, every discovery brought him closer to the truth he wanted to uncover.
"Uh... what does that tell us?"
Looking at the excited Tobirama Senju, Uchiha Izuna could not help feeling baffled. He really did not understand.
"It tells us that the Senju and Uchiha share a common lineage, and its origin is none other than the Sage of Six Paths recorded in unofficial histories. Or rather... the Rabbit Goddess who, according to legend, brought an era to an end."
Ignoring Uchiha Izuna's baffled expression, Tobirama Senju looked at the eye in his hand and spoke excitedly.
He could feel the eye in his palm gradually absorbing the gene fluid made from his elder brother's cells, transforming toward a more perfect state.
And that transformation was very likely leading toward those legendary eyes.
The Rinnegan!
Wait!
Suddenly, as though something had occurred to him, Tobirama Senju stiffened.
Too smoothly. Everything has gone too smoothly. This isn't right! This definitely isn't right! That black sludge from that day... he said my elder brother was sealed on the moon.
And the first step in transforming this eye was merging it with what he provided... the Rinnegan... could the Rinnegan be the eyes he actually wants me to create for him?
All that talk of the Eternal Eye... with his abilities, he could easily capture members of the Uchiha Clan and take his time cultivating them himself. That explains it!
Everything I'm doing now... is within his expectations... he exploited my thirst for knowledge and my curiosity... that bastard...
"What's