C895 Method Found

Elder Gui walked around the stone mirror for a long time as if he was thinking, but also as if he was sure. Wu Yun hid behind Faang Cheng, trying her best to not let the mirror shine on her!

"Wait a moment for me …"

As Elder Gui said this, he turned around and entered his study. Amongst a pile of dusty books, he found an ancient book that had turned yellow!

"I remember..