"Don't worry, I'm strong!" Uchiha Yi's expression sharpened. "Grandma Mito may not be able to keep fighting for long, so I need to end this quickly. Sorry, Father, Second Hokage. I'm going to fight seriously now."
As soon as Uchiha Yi finished speaking, two pitch-black rods appeared in his hands. He vanished and reappeared behind Kagami Uchiha, driving the rods into the base of his spine at a speed beyond ordinary comprehension and pinning him to the ground. Still apparently unsatisfied, Yi pulled out three more Black Rods and drove them into different parts of Kagami's body.
Black Rods were different from Truth-Seeking Orbs. Yi could make as many as he wanted with a thought.
After all, even Nagato could create Black Rods at will. Creations of Yin-Yang Release like these seemed to come naturally once someone awakened the Rinnegan.
Sasuke Uchiha would be able to do the same in the future. He simply had no interest in using Black Rods.
Tobirama Senju's eyelid twitched at the sight. As a master of Ninjutsu and research in the Shinobi World, he recognized the Black Rods at once as creations of Yin-Yang Release. His own mastery of it fell far short of that level.
Despite his elder brother's immense strength, Hashirama Senju was even less likely to achieve it. His Yang Release was so powerful that it affected the Yin Release within him, making any balance between the two impossible. Even using Yin Release at all was an arduous task for Hashirama.
Yet Uchiha Yi, an Uchiha, had attained such mastery of Yin-Yang Release. Tobirama had never expected that.
The Uchiha Clan's Sharingan represented Yin Release taken to its extreme. By all rights, mastering Yin-Yang Release should have been extraordinarily difficult for an Uchiha. Tobirama had to admit it: Kagami Uchiha's son