Wendigo

A Wendigo is a creature that likes to take the form of animals or humans. Animals are it's preferred prey but it can also use humans if needed. It has been known to keep humans alive for days before finally killing them. Their main shelters consist of dark, underground places like sewers or caves. In 2006, it kidnapped three people from a camping ground and killed one, before the other two escaped with the help of the Winchesters. It is finally killed by Sam Winchester using a flare gun.