Xie Lian's disadvantage lies in the fact that he can't really feel pain anymore. And having gotten used to just being able to survive any sort of injury means that if he gets injured here, he might not realize it or at least not be able to tell how serious it is.

"I don't really want to test the theory and see though I have heard that even if you die, you simply come back in a few days." But he would really rather not be the test to see if that is true.