The main theme of Azurite Sea may focus on pirates, but its most valuable Lorcana card is actually Baymax
Its evocative of the dark turn Lion King story while also expressing the extreme board-wiping effect of the card
Pair Perdita, Devoted Mother with some 2 cost characters that have abilities trigger when they enter play like Pinocchio, Talkative Puppet and youve got yourself an effective little recursion engine
Diablo is arguably the single strongest character released in the game to date, and the player market can have a huge impact on a cards value
Couple this with the ablity to move all damage and potentially send a character to the discard pile, and it's easy to see why it's so valuable
Ursula - Sea Witch Queen also has a nicely thematic ability with You'll Listen To Me!, which disallows other characters from being exerted to sing songs