Holy Mountain

The Horned Demon charged into the monster skull made of sand, but he felt as if he had fallen into a swamp. The large sand wave collapsed and scattered back into sand while more and more waves shadowed that first huge sand wave. 

The huge Horned Demon Overlord was slowly covered by the sand. He kept struggling and shouting, but it had no effect. The sand waves kept surging and submerging the Horned Demon Overlord. They could only see the black smoke being continuously covered by the sand waves. The big pile of sand kept changing shape like moldable mud. 

The other two Horned Demon Overlords rushed out to help that Horned Demon covered in Endless Sand.

Birbo, who always seemed to be covered in a layer of darkness, silently advanced to meet the two Horned Demon Overlords.

The black shadow centered around Birbo instantly expanded to cover a hundred meters. That monstrous shadow seemed to suddenly awaken just as the two Horned Demons entered the shadowy area.