"Let’s start with how the Ghost King broke free," Bai Mengjin said, taking out a demon pill and swallowing it. "The Gu Family had it sealed here. We didn't sense anything beforehand, so the restrictions must have been formidable."
Shang Shaoyang looked ashamed at these words. "It's my fault. There was an exquisite mural in that courtyard. I noticed it contained hidden mysteries and felt an impulse to dig it out. I had no idea that I would pull at a corner of the seal, and then..."
Bai Mengjin knew of this mural he spoke of. It was a masterpiece by an ancestor of the Gu Clan who was a master of formations. The knowledge of arrays involved was so obscure that some of it had already been lost to time; it was no wonder Shang Shaoyang had been interested. However, the mural was extremely well-hidden, and it was no small feat for him to have discovered it.
Chapter 500