Spirit Dragon's Embrace

At the beginning of your end step, manifest the top card of your library. (Put it onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if it's a creature card.)
If a face-down card you control is an instant or sorcery, you may cast it. (Turn it face up any time for its mana cost if it's an instant or sorcery.)