Mushroom Marauders

Pillage 1 (Whenever this creature deals combat damage to a player, exile the top card of that player's library. Until end of turn, you may cast that card and you may spend mana as though it were mana of any color to cast that spell.)
Sacrifice Mushroom Marauders: Put any number of land cards exiled with Mushroom Marauders onto the battlefield tapped under your control.
"Infect, poison, grow!"