Draugr

The Draugr are undead creatures from Norse myth. They are thought to be evil spirits possessing the corpse of deceased Vikings. They protect the treasure they’re buried with and collect more treasure by robbing other graves. They are capable of controlling weather, most often causing storms and thick fog. They can also take the form of predatory birds or wolves and possess supernatural strength with an invulnerability to weapons. They rise in the middle of the night to attack sleeping people, consume their flesh and blood, and bring back their bones to gnaw on in the grave. To kill a Draugr, someone who is pure of heart and in good standing with the gods must fight the Draugr hand to hand, most often wrestling them.

Citations:

Maberry, Jonathan. Vampire Universe: The Dark World of Supernatural Beings That Haunt Us, Hunt Us, and Hunger for Us. United States, Kensington Publishing Corporation, 2006.