Werewolves

Werewolves are totally different from vampires, and that stems from the fact that a witch cursed a group of Vikings to turn into wolves every full moon. Since the witch who cast the spell was also practicing Nature magic, she had to bound them to something Naturally occurring and also provide a loophole. She fulfilled both by making them stay human on all nights except the full moon and to keep them a wolf for only 6 hours during the full moon. Werewolves are the natural enemy of witches and frenemies to the vampires.