Shinotatchi

Shinotatchi (Death Touch, 死のタッチ) is a mutational ability caused by a disease Niko Senju sustained during her pregnancy. This was the causing of her death and gave her children the abilities to absorb energy and life force by touch.

Overview
Born with this unique ability caused by an unknown disease, Shiga and Fangu have the ability to absorb the energy, life force, and even cell structure from any living organism through via physical contact. Despite its name, death only occurs when all the life is drained from the target. When coming in contact with a human, the twins can gain intelligence from the target's memories. The knowledge combined with to cell structure of the victim will allow Shiga or Fangu to temporarily possess the abilities of the person whom is being touched. This can even be to revitalize the Mangekyō Sharingan.

Senjutsu Development
By coming in contact with things of nature, Shiga and Fangu can use the energy from them to enhance their own abilities. Since the energy provided is from nature then this can be a implement of senjutsu or Sage Mode.