Name: Shikotsumyaku
Rank: S
Type: Body
Clan: Kaguya Clan
Description: It is a kekkei genkai which gives its wielder the ability to manipulate their own skeletal structure (their osteoblasts and osteoclasts). By infusing their calcium with chakra, they could manipulate the growth and properties of their bones to their liking. The main capabilities of Shikotsumyaku is allowing the user to manipulate the speed of their bones' growth as well as the location of calcium deposits allowing for great versatility. This allows them to create weapons of bones that can either protrude from any part of the body, or pulled out and used like handheld weapons. The user was also able to create armour of dense bone underneath their skin. They can even fire pieces of their bones as long-ranged projectiles.
Any bone that they remove from the body immediately regenerates, as does the skin that is damaged when the bones are removed. Although it seems it takes a bit longer for the limb to become usable again, unless the user regrows the bones consciously. Users can increase the density of the created bones, making them stronger than steel. This not only makes the created weapons very powerful, but also makes their bodies virtually indestructible; the bones can withstand even a chakra-infused blade, which is usually enough to cut through anything. The bones structure can also be hollowed out. The bones have a bonus durability of the user's durability ; speed of manipulation and manifestation is equal to the user's speed. 25 Passive Durability boost to members of the clan.