Kishou Tensei

Ninja : Chiyo
Type : Ninjutsu
Level : S

Developed in Sunagakure, Kishou Tensei lets the user share their spirit with another bringing them back to life. While this jutsu targets both parties, when the target is the dead the user's chakra turns into the corpse's soul killing the user of the jutsu. Soon after development of this jutsu and due to humane reasons it was marked as a "Forbidden jutsu" making the developer, Chiyo, the only one that knows how to use it.