The biggest additions Supernatural provides are witches, werewolves, and fairies, all of which have their own unique powers. Witches can learn and cast spells, werewolves can hunt and transform others, and fairies can use their magical auras for a variety of effects. Witch and fairy powers are well-integrated; simply clicking on Sim allows these supernatural types to use their abilities on themselves or those around them, and the more they use their skills, the more they learn. Werewolves, on the other hand, can be a bit of a pain.
They can go on the hunt in wolf form and find rare, valuable items, which is useful, but their transformation is controlled by the lunar cycle. This means that if the full moon rises while your werewolf is at work, he’ll ditch the job–so much for that promotion. Werewolves can also turn other Sims and form packs to hunt together, though you can expect a sharp relationship decrease once you’ve given the cursed bite to your friends. Eventually, werewolves can control their transformations during non-full moon days, but early on you might be stuck in werewolf form longer than you want to be.