C109 Su Fei's Trump Card(2)

The sinister thoughts Xie Yufei had sparked in Zhang Ao's mind scattered, only to be replaced by an even more irrepressible desire!

Zhang Ao had ascended to the fourth level of Subtlety seven years prior, but had been stuck there ever since. Despite trying numerous methods, he was still unable to break through to the bottleneck of the fourth level.

Now