Creature cards in graveyards and libraries can't enter the battlefield.
Players can't cast spells from graveyards or libraries.
Players can still play lands from graveyards or libraries if an effect allows them to do so.
Manifesting a card from a graveyard or library is an impossible action while Grafdiggerâ€™s Cage is on the battlefield.
Look at the card as it exists in your graveyard to determine whether it can enter the battlefield. For example, Sculpting Steel can be put onto the battlefield as a copy of a creature, but Phyrexian Metamorph canâ€™t be put onto the battlefield, even if it would copy a noncreature artifact.
If an effect exiles a card from a library and allows a player to cast it, that player may do so. The spell is cast from exile, not a library.
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