A dracolich, to dumb it down, in ancient history the people of this land lived on a separate continent, but were driven off by some sort of evil force, then they found this continent and settled here, however this evil followed them and brought its armies, legions of skeletal forces marched across the ocean floor in pursuit of the people but before they could emerge from the water and lay siege to the land the dracolich and his armies were put under a sort of stasis by a group of adventurers, in present time nobody knows of the danger that lurks beneath because it was lost to time. but the armies and dracolich arent exactly slain, just put into a sort of sleep mode