Unearthly Influence

Each player sacrifices all but three lands. Starting with you, each player in turn order reveals the top three cards of the Colorless deck, may cast a spell from among them without paying its mana cost, then shuffles the Colorless deck. Each time a spell is cast this way, that spell’s controller puts three random basic land tiles onto the map in unoccupied spaces adjacent to a pre-existing land tile. {I}(These new land tiles are uncaptured and uncontrolled.){/I} Exile Unearthly Influence.