Servant?

Gu Yao knew that the beast storage treasure wasn't something that could be identified by just anyone. Even in the top sects, there were barely a handful of people who may recognize the symbols on it. This reduced the pool of potential candidates to a handful.

"Your master, what is his cultivation base?" Gu Yao questioned again.

This time his eyes glowed in red and it seemed to have affected Lin Mu.

"And don't try to lie this time, I'll know if you do…" he added.

'Is this one of the techniques that Senior Xukong mentioned?' Lin Mu wondered.

The others were also listening to the question and Wu Hei was particularly interested in this as well. 

"I do not know." Lin Mu straightway said.

"What?" Gu Yao asked feeling a bit bewildered.

"I do not know what his cultivation base is." Lin Mu said again.

Gu Yao glared at Lin Mu and his eyes glowed with a red light. But even after a minute, he seemed to be unable to sense anything.