Fiend Artisan

Laura Plansker's Diabolical DioramasFiend Artisan gets +1/+1 for each creature card in your graveyard. X(B/G), T, Sacrifice another creature: Search your library for a creature card with converted mana cost X or less, put it into onto the battlefield, then shuffle your library. Activate this ability only any time you could cast a sorcery.