It cares about damaging opposing characters and benefiting from it
A three mana 3/3 with Trample and Haste is a decent Aggro card, but nothing exciting in the age of Screaming Nemesis
Even in entries into the franchise where crystals were not central to the central plot, crystals are at least referenced, underscoring their importance to the Final Fantasy universe's overall lore
Low-cost characters (Captain Hook, Forceful Duelist and Goons, Maleficent's Underlings) can do much the same thing, running interference as you prepare
You can also use Cinderella, Stouthearted to shift your Cinderella, Knight in Training into a more formidable threat, then bulk up your Kronk, Junior Chipmunks for some seriously impressive board control
Its through this that you can have a deck of cards that feature both Aladdin in his Prince Ali form, Stitch in his Elvis cosplay, and Minnie Mouse as royalty without raising questions of how exactly they can interact and be together