Tap her for a blue, her +2 counters is ready to go
Whenever Maui is used to challenge another character, the player can add an action card from their discard pile to their hand, which offsets the continuous problem of running out of cards
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)
As each product is made to order it could take time to arrive
Sully, Mike Wazowski, and of course Boo from Pixar's Monsters Inc
Ramp and card draw in one package