The few present were all people who had seen much of the world; the resurrection of skeletons was not something too shocking for them.
In the universe, strange and peculiar things abound and so do cultivation techniques, including some methods of controlling the dead.
The Demon Lord was very familiar with skeletons because he had mastered such techniques of control.
With each strike, he targeted three key spots on the skeletons: the head, waist, and legs.
As long as these three points were destroyed, the skeletons' attacks could be basically ignored.
The Demon Lord's destructive force was strong, and any skeletons that came close were all reduced to bone fragments. Seeing this, others copied his method, specifically targeting these areas too. Although the number of skeletons surrounding them was large, they were unable to truly close in.
The strength of these skeletons was slightly superior to that of magic frogs, but they had much greater numbers, seemingly endless.