Ace was terrified because no one has ever assumed him of being a soul cultivator, much less praising his heavenly sense. This means there is a horrifying being live in this place and he couldn't but think of that nasty feeling he had when he first entered this place.
'How can there be someone else in here?' Ace thought grimly, but he can't run away now because if he moves carelessly in this place he will be dead!
Furthermore, this terrifying being can even sense his heavenly sense. Where can he run if this voice owner wanted to capture him?
Ace takes a deep breath. "Who are you?" As he asked, the invisible bead has already appeared in his hand. If he senses anything amiss, he would shatter it instantly.
"Hoh, me? I'm Patriarch Empty Dream, you must hear of me before." There was a clear pride in this voice as he introduces himself to Ace.