Human Kidō (変形する機動, also known as transmutative kidō) is the act of using kidō to change from one form, nature, substance, or state into another one. Unfortunately, these experiments have given birth to a dark and sinister side of kidō. Whether out of despair, malice or inquisitive hubris, several Shinigami have been known to attempt the application of transmutative kidō to human bodies and souls, in essence, playing god with human lives. But, just as the Law of Equivalent Exchange applies to the transmutative kidō of non-living matter, devastating rebounds can occur in human transmutative kidō because human lives and souls are priceless according to the flow of the world.
Originally created by Seireitou.