The whole point of the deck is setting up a board of sprights, and summoning Melffys as interactions on your opponents turn.
-The deck generally doesn't have to worry about negates, as the Toadally+Elf combo enabled a double omni negate. You usually have red/carrot, but that depends on between hands.
-Along with that, Melffy Wally is a pop+a rip 2 from your opponents hand, which is great. The combo goes Melffy Wally-->Puppy+Katty-->kalantosa+Pinny-->Desert locusts+kalantosa-->Omega. I also like having Merry Melffys just in case for a bounce.
-Joyous Melffys is also just a free 4 material Zeus.
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