Moon Warren

Whenever tokens enter the battlefield, manifest that many cards from the bottom of your library.
Whenever Moon Warren or another card is turned face up or transforms anywhere, put two white, blue, and green 1/1 Rabbit tokens on the battlefield.
Morph {w}{u}{g} (You may cast this face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)