Looking far away, Li Yao and Long Yangjun noticed that fiery snakes were surging out of a handful of caves like volcano eruptions on a wall on the south side of the Great Iron Plants. The fire was in the most eccentric violet color and condensed into hideous shapes in the midair, only to be ripped into shreds by the air cleaning system, as if countless incomplete ghosts had haunted the underground space.
The air cleaning system was overloading and squeaking because of the burn, sounding exactly like the shrieks of the restless specters.
Then, a third explosion that was even louder came over.
This time, Li Yao and Long Yangjun had both sensed the overlapping waves of spiritual energy darting out of the depths of the caves, powerful enough to blow away all the rocks on the wall.