Someone Is Singing

BANG! BANG! BANG! At this moment, in the mountains behind the Heaven Palace Academy, deafening noises were echoing all around this giant chain of mountains. However, no one who wasn't in the immediate vicinity of Xu Que and his gang could hear a sound coming from here. The people who weren't with them couldn't even see that there were any people in the mountains. It all seemed very tranquil.

Actually, this was just an illusion! Xu Que had set up an illusory Array with the Divine Aperture's Shell. The illusory Array had recorded everything going on the mountains behind the Heaven Palace Academy and displayed it at the perimeter of the mountains. Also, the flow of Spiritual Qi and the transmission of sound were isolated by the Array. Now Xu Que and his teammates had sneaked into those mountains and started to bombard the restrictive spells with all kinds of magic arts rapidly!