GURPS Monster of The Week: The Lesser Aptrganger (After Ragnarok)
What looks like a zombie...but is free willed, if not bright, and back from the dead either for vengeance, or simple evilness? The Norse revenant, the Aptrganger. Death-blue in color, which can be anything from blue white to pitch black, these are the foot soldiers of Hel in my After Ragnarok setting. They are not nearly as fragile as fantasy zombies or skeletons, and they do not rot. These have none of the special powers of the greater aptrgangr, or draugr, of which Grimnir is an example (from my Svalbard Pyramid scenario). Suitable for fantasy or horror.