As 666 said, the experimental subjects had really set up traps for him. It was unknown what he would meet once he stepped out of the elevator. The subjects were clearly flustered by the appearance of an invisible enemy who could kill without a sound. Their rhythm had been completely disturbed.
[666: Experimental subject 17, brain power 67%, psychic ability 'The Third Eye'. She is born blind, but in exchange, she can see the energy and matter which ordinary people can't see. 'Invisibility Cloak' only makes you invisible and doesn't completely erase your presence, Host. That's why she is able to 'see' you.]
Lu Yizhou understood immediately after 666's concise explanation. However, he soon clicked his tongue in irritation. Did it mean that his 'Invisibility Cloak' would be rendered useless as long as the woman was still alive? How annoying.
[Where the hell is she hiding?!]