- Name: Mayfly (蜉蝣, Kagerō)
- Type: No rank, Supplementary, All ranges
- User: Zetsu
- Debut (Anime): Naruto Episode 134
- Debut (Manga): Chapter 234
Zetsu can merge his body with the ground and plants to move at very high speeds through the networks of roots and water veins. Once merged, Zetsu's presence is completely concealed, making it almost impossible to detect him. This makes this jutsu perfect for up-close spying and infiltration.