"Why would anyone have nothing better to do and test a thing like that?"
"The predecessor to the Yin-Yang Life and Death Curse was originally an art used to nourish the physical body and soul," Donghuang Xunxian explained. "It allowed one to utilize the power of Yin and Yang to cleanse the flesh and temper the soul, thereby achieving the effect of enhancing one's strength."
"However, the predecessors of my Yin-Yang School discovered something peculiar within it. If this technique is practiced in reverse, it causes the Yin-Yang power gathered within the body to return to the heavens and earth, while simultaneously draining the vitality and soul power of the practitioner."
Chapter 583