Arc 9The Leyline Vessel
Zou Hyuga and Oto Uchiha investigated and partly sealed the weakened Leyline, while their growing closeness drew attention and their actions intersected with Jiraiya, Orochimaru, and the Akatsuki. The Leyline agreed to a contract with Zou, as Obito turned his attention toward recruiting Moryo and cultivating Mangekyō Sharingan.
- Zou Hyuga and Oto Uchiha sealed the earth vein node beneath the Valley of the End, causing tremors and a flood, then escaped the cavern and were made Jonin by the Third.
- Obito Uchiha attacked an Uchiha Jonin for his Sharingan, and Zou identified the Masked Man as Obito after learning he had also attacked Kakashi.
- Zou and Oto traveled to Rōran, where they met Queen Sara, broke the Fourth Hokage’s seal, and found the weakened Leyline’s consciousness.
- Oto sealed half the Leyline in a vessel and anchored the remaining half in the original seal, while a purple phantom entered Zou’s body.
- Zou and Oto encountered Jiraiya fighting Orochimaru and Sasori, helped drive back their attacks, and later learned Jiraiya had gone to Rōran to inspect the seal.
- Jiraiya investigated the Leyline with Fukasaku, while Orochimaru and Sasori collected Leyline-powered puppet remnants and attacked Sunagakure squads.
- Zou followed the Leyline Consciousness to the Valley of the End and made a contract that gave him control of the Leyline in the vessel.
- Danzo reported that Zou and Oto’s public hand-holding might signal an alliance between their clans, while Obito urged Pain to recruit Moryo and planned to cultivate Mangekyō Sharingan.