The reason Madara Uchiha had needed decades to awaken the Rinnegan was, ultimately, because Hashirama Cells had not originally belonged to him. If he himself had possessed a Sage Body and the ultimate Yang Release Chakra, he would not have needed so much time.
Now, he possessed both. His Eternal Mangekyō Sharingan and the life force within his body showed signs of merging, yet it felt as though some barrier was preventing him from breaking through.
Was it because of his bloodline purity? But if that were the case, why had Madara Uchiha been able to awaken the Rinnegan? Because of Indra's Chakra?
Chakra could not affect the purity of his own bloodline.
Or had he simply not developed his Sharingan to its utmost limit? But the Eternal Mangekyō Sharingan was already the Sharingan's limit. What further limit could there be? Was he supposed to develop it to the limit on top of its existing limit?
"Do I still need to wait for some kind of opportunity?"
"I suddenly feel that even if I develop my bloodline purity until it is no weaker than Indra's, I still won't be able to awaken the Rinnegan."
Uchiha Ten sighed. He recalled how, in the original story, Indra had inherited the Sage's Eyes while Asura had inherited the Sage's Body. In the end, perhaps the two of them had each needed a part of the other to awaken the Rinnegan. Unlike the Sage of Six Paths, who had been able to evolve his Sharingan directly into the Rinnegan through pure emotional stimulation.
"Wait, emotional stimulation?"
Uchiha Ten's expression froze as something occurred to him. Had he ever experienced some immense emotional shock that caused his Sharingan to evolve from the moment he awakened it until now?
After transmigrating into his former self in