Undead creatures coming from a desolate, barren planet of Tyranus, Black Skeletons roam around the area to bathe in it's lava source and collecting valuables under the command of the Black Skeleton King.
Grand Interdimensional War
After Enoch built his castle in the center of Tyranus, their king announced their alliance with the Grand Emperor, helping him in his quest to achieve multiversal domination.
After the king was destroyed in the battlefield, the rest of the soldiers took cover into the castle. By the time the castle collapsed and Enoch's death at the hands of Andy Starheart, them along with Tyranus get blown into pieces.