Smelpy's Flapsiness

When Smelpy's Flapsiness enters the battlefield, search your library and/or graveyard for a card named Smelpy, the Ever Weird, reveal it, and put that card into your hand. If you searched your library this way, shuffle it.
Creatures you control have Only Flies With Encouragement. (Whenever a creature attacks, you may flap your hands up and down and say "Fly Derpy Fly!" If you do, that creature gains flyin