Burial Arches

({t}: Add {b} or {g})
When Burial Arches enters the battlefield,
creatures get -1/-1 until end of turn.
{4}{b/g}{b/g}{b/g}, {t}, Sacrifice Burial Arches: Reveal and
exile the bottom card of your library until you've exiled three creature cards. Put the creature cards
into your hand and then put the rest on the top
of your library in any order.