Haugbui

The Haugbui is an undead creature from Scandinavian mythology. Its name means “mound dweller.” They are thought to be corpses who rise from the dead and collect treasure. When angered, Haugbui bring disease and misfortune that lasts through generations. They are believed to use a specific form of black magic called Trollskap. They can be appeased if offered the first bit of milk from a cow who just birthed a calf, or the first glass of ale brewed in a household. In desperate times, people would sacrifice cows to this creature. In other situations, they can be killed with fire or a large group of armed warriors.

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.