Arc 4Jörmungandr’s Trial
Kōki refined his Special Shadow Clone Technique, and Jörmungandr tested his enhanced body against Iwagakure fighters before Aizen negotiated future missions with Ōnoki. Back on the front, Kōki and his comrades were surrounded by Sunagakure ninja, and Kōki refused to leave them behind.
- Kōki improved his Special Shadow Clone Technique with Tobirama Senju’s research, created Jörmungandr from Kawasaki Ya’s corpse, and agreed with Aizen to build an organization.
- Jörmungandr strengthened his body with the Body Revival Technique and Medical Ninjutsu, opened six of the Eight Gates, and learned that each use cost him half a year of his lifespan.
- Aizen and Jörmungandr accepted a black-market mission to kill Iwahato, and Jörmungandr defeated him before fighting off Ōkura Suke’s Iwagakure unit.
- Butō challenged Jörmungandr, lost their taijutsu contest, and failed to defeat him with Earth Release or Dust Release before Ōnoki intervened.
- Ōnoki rescued Butō, offered Aizen and Jörmungandr work for Iwagakure, and arranged to post suitable missions on the black market with a sun symbol.
- Kōki joined Nara Yūsuke, Akimichi Tsuyoshi, and Yamanaka Kenji in destroying a Sunagakure outpost, then saved the trio from two enemies who exploded.
- After the squad was surrounded by more than a hundred Sunagakure ninja, Kōki stopped Akimichi Tsuyoshi from using the Three-Colored Secret Medicine and vowed to protect his comrades.