User with this ability is a werebeast, a being with the power to transform into an animal form or a humanoid animal-like creature, either purposely or after being placed under a curse and/or therianthropic affliction via a bite or scratch from a werebeast, or some other means. This transformation is often associated with the appearance of the full moon. Though the most common werebeast is a werewolf, werebeasts can be virtually any animal.