Xiao Chen's body trembled!
Honestly, this time, Xiao Chen was truly startled.
Xiao Chen suddenly turned his head to look towards the location of Heavenly Ravine.
Heavenly Ravine remained as it was before, unchanged, with a mass of spiritual energy still flowing in a regular pattern.
But Xiao Chen had clearly heard someone speaking.
No, the voice wasn't heard!
It appeared directly in his own mind!
Xiao Chen was certain that even if someone were more formidable than him, he would not mistake hearing for feeling!
But that made it even stranger!
Who could transmit their voice directly into his own head?
How strong would they need to be?
Xiao Chen even suspected that the owner of the voice was Heavenly Ravine!
Could it be that Heavenly Ravine was a living entity?
Xiao Chen thought for a long time but couldn't make a convincing judgment to himself!
However, just as Xiao Chen was baffled...
He suddenly remembered a phrase!