He wasn't able to understand why the earth in which they lived attracted so many negative entities.
Dark Lord, AS organization...and now this Skeleton King.
The moment he landed on the death plane and fought with some demons, he saw a huge amount of skeleton army practicing.
He was surprised by their intelligence and coordination.
Was this still considered low-level monsters?
It was then that he understood why even the most powerful people were defeated...
However, the most surprising thing was Middle-level skeleton monster was able to talk, and by mistake, he heard their plan to attack the Earth.
The Middle-Level Skeleton Monster was conversing with a Huge Skeleton King about how they would find the spatial portals the next time and attack the Earth.
Qiao Jun's first guess was that the Huge Skelton King seated on the throne was the dark lord.