The monsters were once humans but then were corrupted into becoming orcs, oger and trolls. Some of them were unique beings and the leaders. Once those more powerfull monsters have been the priests of Zaltec. The most mightiest of all beings after the destruction was still the patriarch of the evil god Zaltec. Hoxitl was corrupted into a being of the lower planes but could still use all of his clerical might and spells. He was the leader of the monster army and ruled still as the highest priest of Zaltec from his temple-pyramid in the center of the destroyed city Nexal.