Take the case where there is a tiny crease and some whitening
Starmie, Gyarados, Blastoise, Articuno, and Palkia have all had genuinely viable EX versions, while Greninja is useful across several decks, and Vaporeon, Manaphy, and of course Misty have each been added to provide very strong, Water-specific support in different forms
Well, it's because you can easily slot a few Mutavaults into your list - an MTG land that can become all creature types - to supercharge the card
Because you cast whatever creatures Azula swipes, you don't need to worry about giving it back if your opponent removes Azula like you would with Mind Control variants, and the enters ability means your opponents are always two-for-one'd at best
Let's discuss the Listed Median price more
For example, Bite of the Black Rose forces your opponents to discard two cards in the event of a tie