- Name: C0
- Type: Hiden, No rank, Offensive, All ranges
- User: Deidara
- Debut (Manga): Chapter 362
The highest form of Deidara's Exploding Clay (his "Ultimate Art" (究極芸術, Kyūkyoku Geijutsu)), C0 is a suicide technique used as a last resort. He eats a large ball of clay with the mouth on his chest. This consumes his entire body, condensing the body into a large black sphere with jagged teeth and pupil-less eyes. The sphere then opens up and detonates, destroying everything within a blast that covers more than ten kilometers.