Introducing one of the enemies to the game...
Draugr - live in their graves, often guarding treasure buried with them in their burial mound. They are animated corpses with a corporeal body, unlike ghosts, with similar physical abilities as in life.
What happens when you kill it again? Do they go to Valhalla or they went back to where they came from? I was under the impression that Valhalla needs any warrior fallen in combat. After all, there is more gold in Valhalla then in their graves