Chiryūmyaku

Chiryūmyaku (地竜脈, Literally meaning: Earth Dragon Pulse) is a kekkei genkai that gives its wielder the ability to transform partially or fully into a dragon-like entity. This kekkei genkai is inherited among into a few members of the Hakuyō Tribe. This ability apparently alters the user's appearance, to the point where they rarely look like either of their parents.