(Centaur Slagheap isn't a spell.) At the beginning of your upkeep, Centaur Slagheap deals 1 damage to target creature you control. : Target player exiles a card from his or her graveyard. , Pay 1 life, Sacrifice Centaur Slagheap: Search your library for a Mountain or Forest card and put it onto the battlefield, then shuffle your library.