Xu Cheng was in the middle of reaping lives, and with more and more people disappearing, it wasn't like no one was noticing it.
After all, they were on the same communication channel, and when one tried to reach another one but got no reply, the former would obviously feel suspicious and go and check on the latter.
After Xu Cheng killed the 90 or so soldiers that were responsible for looting, they obviously couldn't give any status report on their mission to the others, and the other soldiers were on alert. Then, a team began coming into the bedroom area again, but Xu Cheng wouldn't give them the chance to go into the rooms to discover the corpses. He was quick, and like a cat, he nimbly sped down the hallway without a sound.
A dozen mercenaries that walked past him in the hallway didn't detect anything, but when they felt that gust of wind blowing past them, it was like an invisible scythe, decapitating them swiftly before they could even react.