Lex looked at the five others who were chained to their chairs as well, but did not recognize any of them. He tried to use his spirit sense to see if he could learn anything else, but discovered that not only did his spirit sense not exist, he had none of his cultivation, either. He was back to being a mortal human.
The revelation did not scare Lex, though it did make him realize the peril of his predicament. He could not just shrug away a shot from that gun, like he had assumed. But since Lex knew death in the Mystery trial would not translate to death in real life, he was not worried. All this meant was that Lex would have to play by the rules of the trial.
Suddenly, another thought occurred to him. Other than polishing whatever skill the trial thought Lex had, this was actually pretty fun. It was like playing a video game, but with ultra realism.