Momir, Neo-Simic Chairman

Momir, Neo-Simic Chairman enters the battlefield with a +1/+1 counter on him.
Counterflux 1 {5}{g}{u}
Whenever a counter is moved onto Momir, you may search your library for a creature card and reveal it. If you do, shuffle your library and put that card on top of it.
Whenever a counter is moved off of Momir, reveal the top card of your library. If it's a creature card, put that card into your hand.