Shikotsumyaku

Shikotsumyaku (Literally meaning "Dead Bone Pulse") is the Kekkei Genkai of the extinct Kaguya clan, which gave them the frightening 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. 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.

Most of the Shikotsumyaku abilities came in the form of bone-utilizing dances named after flowers. The Dance of the Camellia (Tsubaki no Mai), uses the humerus of either arm as a sword. The Dance of the Willow (Yanagi no Mai) uses extensions of bone from the body to attack the opponent, coupled with large amounts of acrobatics to increase the attacks' effectiveness. The Dance of the Larch (Karamatsu no Mai) uses growths of the user's preexisting skeletal structure to ensnare the opponent and stab them as the bones are growing. The Dance of the Clematis (Tessenka no Mai) is an attack with two parts, the first being Vine (Tsuru) and the second being Flower (Hana). 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 Dance of the Seedling Fern (Sawarabi no Mai), creates a giant forest of bone spikes that emerge from the ground and impale the opponent. Finger Bullet Drill (Teshi Sendan), fires the user's fingertip bones like bullets.