Grafdigger's Cage | Magic: The Gathering
Formats Grafdigger's Cage is Legal in
Official Oracle Text for Grafdigger's Cage
Players can't cast cards in graveyards or libraries.
Official Rulings for Grafdigger's Cage
4/15/2013 : The first ability checks only whether the card is a creature card in the graveyard or library. A card such as Sculpting Steel can still enter the battlefield from a graveyard or library as a copy of a creature.
4/15/2013 : The second ability doesn't stop players from playing land cards from graveyards or libraries since lands aren't cast.