C434 Obtaining the Xuan-yuan Sword

According to the explanation given by the system, the ability "Great Demonic Emptiness" required the activation of demonic energy. Therefore, in order to learn "Great Demonic Emptiness", one had to transform their body into a demonic body, a body that could contain demonic energy.

But to turn Ye Ling into the kind of old man who was neither human nor ghost