Nyarlathotep

You may cast this spell from your graveyard or from exile.
At the beginning of each player's upkeep, if Nyarlathotep is in the graveyard, in exile, or on the battlefield, you may have Nyarlathotep become a copy of any creature on the battlefield, except its name is still Nyarlathotep, it's legendary in addition to its other types, and it gains "You may cast this spell from your graveyard or from exile." and this ability.