rainbow yugioh card “Rainbow Gravity” LODT-KR065 Korean Ver Common – K-TCG An individual card from the Yu Crystal Beast Rainbow Dragon -

Delver of Secrets and Haughty Jinn are both solid fliers

While not doing anything on Turn 3 or 4 is a hard sell, it could work if you can flood the board with Goblin Guides and Wild Nacatls over the first couple of turns

It costs only 1 white Mana, so you could get this out on turn 1 to start doing its work

While The Brothers' War meld cards still run the risk of having a part of the meld pair removed in response to the meld effect, most of the cards doing something pretty much as soon as they meld is a big improvement on the original cards

It's one of the decks I play early in the evening, so I save myself and the playgroup from half-hour turns just moving dice around