(Mistveil Catacombs isn't a spell.) When Mistveil Catacombs enters the battlefield, return a land you control to its owner's hand. Whenever a card is put into a graveyard from anywhere, exile that card. , Pay 1 life, Sacrifice Mistveil Catacombs: Search your library for a Plains or Swamp card and put it onto the battlefield, then shuffle your library.