The Sundering: Rise of the Witch King is a mod for Medieval 2: Kingdoms and based around the fantasy world of Game workshop's Warhammer universe during the civil war between the Elves, the mod's campaign opens with the Death of Bel Shanaar in -2751 IC.
The Tomb Scorpions once guarded the Tombs of ancient kings, ensuring that those of a curious nature never escaped alive. Now their Undead husks are bound to the spirit of a mummified Liche Priest, whose ruined body is carried within the carapace of the Scorpion. As a result, the Tomb Scorpions are immensely powerful and highly resistant to magic, their own vengeful spirits bolstered by the proximity of the Liche Priest within them. Beneath the field of battle they wait patiently until they are called to the surface, their claws tearing through anything above them in a swelter of gore.