What types of cards usually feature transformation abilities?

Transformation abilities are predominantly found on double-faced cards. These cards have two sides, each depicting a different card, and they can switch from one side to the other under specific conditions. The first side is typically represented by a standard card type, such as a creature or an enchantment, which can transform into a different version of itself, often with distinct characteristics or abilities.

Double-faced cards are unique in that they require special rules to manage their transformation, such as being a creature that transforms based on particular triggers or game events. This transformation mechanic allows for dynamic gameplay, where a single card can serve multiple functions throughout the game.

Although other card types might include abilities that reference transformation, they do not follow the distinct double-faced card structure that facilitates the transformation mechanic. This characteristic makes double-faced cards the primary type associated with transformation abilities in Magic: The Gathering.