Because of the special property of the Purple Mansion to erase memories, over the many years, various Sects have employed methods to protect their talented disciples from being killed here.
The most common method is to implant a special imprint on the body. If the disciple is killed, this imprint would transfer onto the murderer, allowing Sect experts to track down the killer based on their perception of this imprint.
Of course, planting a special imprint within the Purple Mansion is very difficult, but there have been precedents, and no one dares to take the risk.
Out of fear for this, unless there is a conflict of interest, or if both parties do not harbor hatred toward each other, they usually would not strike to kill.
"Attack!"
The man in the gray robe's eyes narrowed as if he had detected Cheng Xuefei and Lan Wensu communicating telepathically, and he uttered a light chant while locking his Qi onto Lan Wensu and another man from the Northern Boundary.