"It seems you know my Impure World Reincarnation Jutsu quite well." Tobirama Senju was thoroughly pleased with Uchiha Yi.
He had more Chakra than Tobirama's elder brother, more terrifying Eye Power than Madara Uchiha, and an even greater aptitude for learning than Tobirama himself. His Swordsmanship surpassed both Tobirama and Uchiha Izuna, and he used the Flying Thunder God Technique better than Tobirama did. The student had truly surpassed the master.
Tobirama specialized in Water Release, but Uchiha Yi seemed better suited to Lightning Release. That much was clear from the little details in his movements.
However Tobirama looked at it, Uchiha Yi was an excellent successor. He was simply too young, and his political instincts remained untested. Then again, that was no great concern. As long as he wasn't so naive that his subordinates could easily deceive him, he would be fine.
With his overwhelming strength alone, Uchiha Yi could keep the entire Shinobi World in check. Aside from Madara Uchiha, who was still in hiding, Tobirama couldn't think of anyone who could match him. Uchiha Yi was bound to be a future Hokage.
Since he knew he couldn't stop it, Tobirama might as well do him a favor. If Uchiha Yi, a descendant of the Uchiha, could take down Madara Uchiha, so much the better.
As for how Uchiha Yi knew about the Impure World Reincarnation Jutsu, that wasn't hard to understand. Given his standing in Konoha, he was likely being treated as the Hokage's heir.
Even if he didn't learn the Ninjutsu recorded in the Scroll of Seals, such as Impure World Reincarnation, he would need to understand them. The Black Rods he had used earlier showed that he knew the technique's strengths and weaknesses.
"Yes. I studied the Impure World Reincarnation Jutsu. To be honest, it's