Looking at the enormous skeletal figure, Xin Feng wondered how he could take care of it. After the overlord had appeared, the sky had instantly darkened, signifying the brewing storm. Xin Feng decided to call the skeletal figure an overlord, since it was created from multiple skeletons that were once their own kind of lord.
'Is light his weakness then?' Xin Feng wondered, as that had to be the reason for the sky to darken. It couldn't possibly be to increase the immersion of their battle, nor could it be to give itself a better aspect. That would be impossible after all, as the colossal skeleton seemed to be dumber than a child. It acted exactly like a brute from the stone ages.
Other than creating the clouds to remove its weakness, spicing up the mood of the show for the demon lord was also a possibility Xin Feng thought of.