C856 Totem Mark
Wu Zang and the other three observed the changes that Leng Wuhen was going through to varying degrees. Of course, each of them had a slightly different feeling about the Soul. From what they knew a thousand years ago, the mutated Soul wasn't as easy as Leng Wuhen's current feeling of success.
Basically, many people's minds were lost in the process, and became half-corrosive