This is the article on the anime-only kinjutsu used by Kagerō. If you are looking for the article on the genjutsu used by Itachi Uchiha, head to Ephemeral. For other uses, see Utakata (disambiguation).
The user creates four firefly-like chakra wings and fires out a powerful energy blast from them. Kagerō claims that this jutsu can be used only once in a lifetime, since it consumes so much chakra that the user is left in a near death state after performing it. During the duration of this technique the user can also transport themselves instantaneously using a technique that is similar to teleportation.