Shikotsumyaku



Shikotsumyaku (屍骨脈; Literally meaning "Dead Bone Pulse", Meaning (Viz) "Macabre Bone Pulse") is the kekkei genkai of the extinct Kaguya clan, which gave them the ability to manipulate their own skeletal structure (theirosteoblasts and osteoclasts). By infusing their calcium with chakra, they could manipulate the growth and properties of their bones to their liking.[2]  The ability seems to be rare amongst the clan members, as Kimimarois the only known user even prior to his clan being eradicated.

Apparently, this ability gives the user a unique skeletal structure, as when Kimimaro was fatally ill, Kabuto Yakushi claimed there had been too little information on his body to give any medical treatment.[3]  After integrating Kimimaro's DNA into himself, Kabuto was able to gain access to this kekkei genkai which he uses through a doppelgänger of Kimimaro, which emerges from the base of his navel snake.[4]