"revenant." A revenant, an undead creature in Norse mythology. They are typically animated corpses capable of inflicting injury on people and property. They can be killed by decapitation.
The draugar often inhabit burial mounds, guarding treasure, for example Þráinn. Another draugr is Glámr in Grettis saga Ásmundarsonar; he is killed by Grittir but curses his slayer and this is seen as the cause of Grittir's later misfortunes. In Eyrbyggja saga, Þórólfr Half-Foot is also reincarnated as a draugr. He leaves his burial mound and causes devastation in the area of Þórsnes (Stykkishólmur) before he is finally laid to rest.