Shikotsumyaku

is the Kekkei Genkai of the extinct Kaguya clan, which gave them the ability to manipulate their own skeletal structure. They had free control over the cells responsible for bone growth and replacement, allowing them to manipulate their bones at will. They could protrude their bones out through their skin with any injuries that would be received during this process healing instantly, change their bone density, and could even completely regenerate a lost bone. An example of this is seen with the, which fires the user's fingertip bones like bullets. All this makes their bodies virtually indestructible, and any point of contact on the body could become as sharp as a spear tip, giving them a nearly perfect defense. The ability seems to be rare amongst the clan members, as Kimimaro Kaguya was the only one to exhibit it out of his entire clan.

Most of the Shikotsumyaku abilities came in the form of bone-utilizing dances named after flowers. The most basic of these dances is the, which uses the humerus of either arm as a sword. The uses extensions of bone from the body to attack the opponent, coupled with large amounts of acrobatics to increase the attacks' effectiveness. The defensive uses growths of the user's preexisting skeletal structure to ensnare the opponent and stab them as the bones are growing. The is an attack with two parts, the first being  and the second being. With Vine, the user rips out their spinal cord and use it to trap the opponent. Once immobile, the user uses Flower to form the body's strongest bones into a giant drill on the user's arm to crush the stationary opponent. The final dance,, creates a giant forest of bone spikes that emerge from the ground and impale the opponent.