Barrow-wights

These spirit-animated corpses of the dead not only prey upon careless travellers but also appear to be undead beings that defy nature and the very rule of Ilúvatar (although the true souls of the deceased have indeed passed into the West).

Detailed Description
Barrow-wights appear as dark, shadowy forms with glowing lights for eyes. They attempt to capture living beings and sacrifice them to whatever evil power they now worship (in Middle-earth, usually Morgoth), thus gaining the life energy of the victims, which is what wights "feed" on. As they draw energy, they become more corporeal, showing hands like claws and faces like skulls. If seen with magical means, they appear as faded, pale versions of their former living selves. They possess a 60-ft radius Fear spell that is an intrinsic facet of their being; in addition, they can either paralyze or use sorcerous sleep on their victims to keep them immobile while the wights drain 5 constitution points per round. When all of the victim's constitution is gone, he dies. Barrow-wights can use the actual weapons and magical items buried with them.