Mort Terrors are the general term for the class of creatures created by Sulmur to carry out his divine will on the Material Plane.
Current types of Mort Terrors include:
Morticores∞ - Enforcers of the mortality.
Mortivores∞ - Soul banishers.

Mort Terrors can all be found fairly commonly in the Barren Mort∞, though Mortivores are the only creatures whose main concentration is in this area. The Barren Mort is located on square (23,23)