Wendigo
In Algonquian folklore, the wendigo () or windigo is a mythical man-eating monster or evil spirit native to the northern forests of the Atlantic Coast and Great Lakes Region of the United States and Canada. The wendigo may appear as a monster with some characteristics of a human or as a spirit who has possessed a human being and made them become monstrous. It is historically associated with murder, insatiable greed, and the cultural taboos against such behaviours.
Wendigo
In some traditions, humans overpowered by greed could turn into wendigos; the myth thus served as a method of encouraging cooperation and moderation. Humans could also turn into wendigos by being in contact with them for too long.