Wiktionary
shapechanger
n. A creature that can supernaturally change its physical form.
Usage examples of "shapechanger".
Upon his death, Alaron gave the sword to a shapechanger for safekeeping, to keep it from the hands of the defilers, whose touch would cause the magic blade to break and shatter its enchantment.
The shapechanger had managed to kill both Mona the woman warrior, and the Conan-jock, and Diefenbaker had been so badly hurt in the rescue attempt that he was down to one hit point, and his healing spells were used up.