Shes not a defensive character, though - ability The Singing Sword means Cinderella, Stouthearted can dish out just as much as she takes, becoming able to challenge opponents ready characters on the same turn you play a song
Hell, I'd consider building something for constructed around her
Perhaps even higher, since Standard typically drives more demand
In a Two-Headed Giant game, life gained by your teammate won't cause The Wind Crystal's second ability to apply, even though it will cause your team's life total to increase
Wizards describes the set as the largest collection of Final Fantasy art ever released in a single game
Essentially, if you have a full party with all four of these on the board, you can pay one white, one blue, and one black mana to give the Warrior lifelink, deathtouch, and make him unblockable (deathtouch and unblockable at the same time has no real use, but thats still OP to think about)