Arc 12The Uchiha Relocation
Shinsei trained with the Nine-Tails, brought Naruto and Sasuke closer to their new powers, and helped Uchiha clansmen relocate to Konoha. As he developed a plan to protect the shinobi world from the Infinite Tsukuyomi, the White Snake Sage cultivated Dragon Vein energy and the Eight-Tails went missing.
- Shinsei investigated Rōran and learned that the White Snake Sage could cultivate a remnant of Dragon Vein energy into a means of reaching another Shinobi World.
- Shinsei studied the Nara Clan's Yin Release techniques, taught Shikamaru the Visualization Method, and received a scroll on Yin-Yang Release from Shikaku.
- Shinsei forced the Nine-Tails to share his chakra, mastered its golden chakra tails, and showed Naruto how to use Nine-Tails Chakra Mode.
- Naruto gained Kurama's chakra, and Minato tested Naruto and Sasuke's new abilities before Shinsei agreed to help Sasuke bring Uchiha from another world to Konoha.
- Shinsei helped Tsunade persuade the Uchiha leadership to allow relocation, and Uchiha Mikoto joined the clansmen who moved to Konoha.
- Shinsei revived Itachi, who agreed to investigate Ryūchi Cave and Dragon Vein energy, while Shinsei trained under Hidan and worked to decode human body signals.
- Shinsei and Tobirama devised a Yamanaka mental network to counter the Infinite Tsukuyomi, and Shinsei studied how to strengthen the network with Rinnegan nodes and tailed-beast chakra.
- The White Snake Sage sacrificed a man to cultivate Dragon Vein energy into a chakra life-form, and Tsunade told Shinsei that the Eight-Tails had gone missing.