Junkeisaisei

Junkeisaisei (純系再生,Pure Bloodline Reincarnation) is a ability used by ancient Ōtsutsuki during the great war. Developed through the mastery and knowledge of their own unique bodies. In the event that their bodies are near death, it will begin to pull in organic matter from its surroundings and creating a mass of genetic material. The users body will then began to overwrite the genetic structure of the gathered material and shape the mass into a new body. The body is stated to be in its peak condition and known to be the body the user had in their prime. Due to the Ōtsutsuki's body rewriting the genetic structure of the gather material to match their own. They are unable to obtain the abilities of others of the gathered material.