Transformation
From DALpedia
Transformation is the ability to morph one's default body into something else. The target object could be both animate and inanimate, although the latter was used sparingly, if at all. The target for transformation is usually some sort of an animal. Different forms are assumed for different tasks, i.e. a dragon for destruction, a mouse for sneaking, etc.
The most famous form of Transformation, which is used by Gepardis, is containing the essence of a creature and using it to temporally change form and gain the abilities of the creature.