Upon entering play, she can exert up to 2 characters, preventing them from switching to Ready on their owners next turn, which is a thematic representation of her freezing abilities
if not universal, for the respective print run
Its bad if you hit a huge creature and they get another one, but many times, youll get rid of a 1-drop in a clean way or transform a very important creature into a mana dork
You might want to check what kind of box you have
Cards like Jasper: Common Crook, Iago: Loud-Mouthed Parrot, Mother Knows Best, Dragon Fire, and more are all great for throwing a wrench in someone else's plans, making it easy to impede progress with this Disney Lorcana starter deck