Although the hollow spirit state didn't use his full power the first strike and could be said to be ambushed by Ye Mo, he still felt threatened.
So as soon as Ye Mo used his first strike, he raised his cultivation essence. Indeed, he felt his cultivation essence slow down as though being bound. The hollow spirit state middle stage immediately knew things weren't good. He forcefully released the 8 trigram mirror and broke free from cultivation essence bind using his full might.
As soon as the mirror was released, it expanded in the air and completely covered Ye Mo. Before Ye Mo could use more Illusion Cloud strikes, he felt his sea of consciousness hurt. Ye Mo immediately realized that this was a spirit sense attack magic artifact.