A shapeshifter is a being with the ability to change shape and form. The term is usually used to refer to a human who has the power to take the form of a specific creature and then change back, but it can also be used to refer to any being, creature, or spirit with the ability to change form, and there are many.
The ability, among humans, to voluntarily shapeshift may be inherited, acquired through ritual sorcery, or granted by Satan after agreeing to do his bidding.
Involuntary transformations occur in humans who have been cursed, the curse can spread like a disease.
See Also: Creatures by Type » Shapeshifters