C294 Sky-piercing Snake Advanced

At the bottom of a valley in the Emperor of the Underworld Secret Realm, the surrounding flowers and plants were lush and verdant. Under Tang Ao's care, Liu Hanxiu closed her eyes and concentrated on refining the pure medicine from the Herba Psidii.

At the same time that Liu Hanxiu was refining the Herba Psidii's medicinal power, Tang Ao did not stay idle either. At this time