Cita:
204.3d - If an instruction requires choosing a subtype, you must choose one, and only one, existing subtype, and the subtype you choose must be for the appropriate card type. For example, you can't choose a land type if an instruction requires choosing a creature type. [CompRules 2009/07/08]
Example: When choosing a creature type, "Merfolk" or "Wizard" is acceptable, but "Merfolk Wizard" is not. Words like "artifact," "opponent," "Swamp," or "truck" can't be chosen because they aren't creature types. [CompRules 2009/07/08]
Sisi può nominare qualsiasi tipo di creatura. E Rogue è un tipo di creatura.