The original Blue Moon game comes with only two preconstructed races for you to use; this expansion adds one race to your collection to utilize during a game.
The Aqua is an interesting race, and honestly isn't my favorite. However, I have one friend who swears by them, and that's the whole point: you want to have enough races where everybody will have their favorite and identify with a specific one.
This might just be my favorite Blue Moon deck. Raw, straightforward power with some nasty tricks. Keep slammin' them with 7-10 strength with alarming frequency.
Plus, they squash the little Khind so well, that's a plus in my book.