Arc 21The Aging Potion Trials
Shinji tested successive Aging Potions on demons while training Shion and pursuing a stronger formula. After the Type Three Potion proved less effective than hoped against Kokushibo, Shinji turned to a Type Four Potion and took Neji to the moon, where Toneri confronted him.
- Kokushibo overwhelmed Sasuke until Haku injected him with the Type Two Aging Potion, and Shinji later sent Haku and Sasuke to test it on Upper Moon Two.
- Upper Moon Two defeated Sasuke, who survived by using Izanagi at the cost of temporarily losing his right eye, while Shinji resolved to improve the potion.
- Tsunade’s squad captured Upper Moon Five, but the Type Two Potion strengthened him during a trial, so Shinji used Izanagi to devise a stronger Type Three formula.
- The Type Three Potion weakened Upper Moon Five in a live trial, and Shinji took Shion to test it on Kokushibo after she demonstrated her sealing technique.
- Shinji injected Kokushibo with the Type Three Potion, but Kokushibo quickly metabolized it and resurrected from hidden flesh, prompting Shinji and Shion to withdraw.
- Shinji began planning a Type Four Potion and arranged another lunar trip so Neji could absorb Chakra from the Giant Tenseigan.
- Shinji and Neji reached the Giant Tenseigan, but Neji’s exoskeleton began absorbing its Chakra, forcing Shinji to seal it as puppets surrounded them.
- Shinji fought off the Tenseigan puppets while Neji escaped, and Otsutsuki Toneri appeared before him.