Draugr

A draugr, draug or (Icelandic) draugur (original Old Norse plural draugar, as used here, not "draugrs"), or draugen (Norwegian, Swedish and Danish, meaning "the draug"), also known as aptrganga ("afturgöngur" in modern Icelandic) (literally "after-walker", or "one who walks after death") is an undead creature from Norse mythology, a subset of Germanic mythology. The original Norse meaning of the word is ghost, and older literature makes clear distinctions between sea-draug and land-draug. Draugar were believed to live in the graves of the dead, with a draugr being the animated body of the dead. As the graves of important men often contained a good amount of wealth, the draugr jealously guards his treasures, even after death.