Through the vile influence of the Yama Kings, Chi can be so corrupted and tainted that it poisons everyone who tries to use it. Those who continually use it without proper rites are inevitably drawn to the Scorpion Eaters and their ilk, until they surrender to the will of the Yama Kings and become Akuma. It can be used in order to fuel Demon Shintai and Bile Shintai.