Chapter 519: Chapter 519: I definitely will.

He had indeed heard the principal of the capital city mention the conditions for using the instrument before. Zhou Huai couldn't help but feel a bit of a headache.

He had originally hoped that with the help of Professor Li Zheyuan's equipment, all his clones would achieve a qualitative leap in their level. It seems that this is not possible at the moment.

He silently memorized the appearance of the Mortal Demon Source Stone and bowed slightly to Professor Li Zheyuan.