Unlike firebending cards, you retain the mana so you can throw a Yargle under the bus to get out a Crackle with Power, or you can pour mana into Ozai's activated ability, which interacts with cast-from-exile synergies
Cursed Merfolk Ursulas Handiwork sets up an aggressive early start, generating 2 Lore and forcing the opponent to target and banish it
Not only can you draw an absurd amount of cards off it, you can also give all non-humans +3/+3 until end of turn if youre looking to end the game
1 Secret Victory card
With Mayael, you can pay six mana to take a look at the top five cards of your deck, taking a creature with a power of five or more and putting it directly into play
So, rather than spending the next couple of paragraphs trying to justify my rankings, let's do something a bit more fun and talk about my favorite non-legendary new card from each deck