Whether it was called qi, lifeblood, or humors, the belief in such an essence  was common throughout the world, and still persists  in the stories of creatures who can somehow drain life from others, or some form of magical sources  that can replenish it.
Quer seja chamado "Ch'i", força vital, ou humores, a crença nesta essência era comum em todo o mundo e ainda persiste nas histórias de criaturas que podem de alguma forma sugar a vida de outras, ou alguma fonte de magia que a pode restaurar.