Mayfly (Подёнка) is an infiltration technique characteristic of White Zetsu and his clones, whose bodies are saturated with Hashirama Senju's cells. It allows merging with the earth's surface and vegetation, using an underground network of roots, water veins, and organic matter to move swiftly across vast distances. Its speed is inferior to space-time techniques like Kamui, but remains extremely high.
By merging with the surroundings, the user completely disappears from perception - even experienced sensors cannot detect them, making Mayfly an ideal close-range espionage tool. The technique also allows hiding inside trees, grass, and even sand. If Zetsu does not wish to leave an occupied position, he can connect to the root system and transmit messages to other clones through it.