Yaoji picked up the thread of the conversation. "That is strange then. If the method of absorbing yin to nourish yang is so powerful, why are the Four Devils of Dust so weak? If they used corpses to practice it for over three thousand years, their strength should have reached an unfathomable level by now!"
Chapter 1098: Hua Qiluo
"The Four Devils of Dust are four perverts who only used women to absorb yin and nourish yang. Furthermore, from searching their memories, they had no idea that the technique could be practiced using corpses. It was Dizang and I who accidentally discovered that the secret art could absorb the corpse aura within dead bodies!"
Porn Director explained.
Chapter 441