The fact that this negation also costs you nothing is mind boggling
From right to left we have the one-drop who is going to end all your dragons' dreams, a 5/5 two drop that's actually a secret board wipe, and a turtle who thought this was the reptiles set and would be broken with Vigilance
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
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
You can see if supply changed and better understand the reasons behind price changes