Marauder's Map

Your opponents play with their hands revealed.
{3}{g}{t}: Sacrifice Marauder's Map. Search your library for up to two basic land cards, reveal
those cards, and put one onto the battlefield
tapped and the other into your hand. Then
shuffle your library.
{1}{g}{w}{t}: Sacrifice Marauder's Map. Search your library for a creature card, reveal it, and put that
card into your hand. Then shuffle your library.