Powers in The Elder Scrolls V: Skyrim are defined by their unique nature. They are essentially magic spells, but are unique in that they have zero magicka cost, are not learned from spell tomes, most of which may only be used once per in-game day. Each race is granted a unique greater power upon character creation, and additional powers may be acquired over the course of the game. These powers include Vampire and Werewolf powers, as well as those granted by Standing Stones and through membership of various factions. These powers can only be used once a day.