One's Own Life Reincarnation

Chiyo of the Hidden Sand was once in charge of a Puppet Brigade research squad, with the stated goal of developing a Ninjutsu that could give life to a lifeless puppet. After a long and intensive period they partially succeeded. The result was a Tensei Ninjutsu that has not been officially named. On a personal level Chiyo stated that she developed the technique for her grandson Sasori should he ever need it, though she would only find out twenty years later that he ironically had also become a puppet. This technique was designated a Kinjutsu and the project halted, due to the fact that it was fatal to the user and to date Chiyo is the only known person with the knowledge to use it. Chiyo used this technique twice, the first time was on Sakura and because she was not dead Chiyo did not die herself. The second time she used it to revive the Fifth Kazekage partially out of duty and partially out of atonement for having sealed Shukaku in him in the first place.