Ibro didn't order his skeletons to attack that moleecian monster, but he ordered them to attack those who were in a heated battle with the crazy cultivators.
They were hardly holding them back. By the addition of Ibro's skeletons, that balance was broken at once. Ibro was prepared for this moment.
The logical move was to hold that angry moleecian, but he chose to kill those away from him first. His choice was obvious to everyone. He was planning to help his allies so they would help him after.
That incident after the other gave hope again to the incoming cultivators. They didn't waste the chance Ibro created for them. In a few minutes, they managed to kill all the moleecians around them with the help of the endless skeletons.
Although these skeletons were weak, they had different classes in them. They also had some strong skeletons like that alpha death knight. That death knight played a major role in ending this fight very rapidly.
