
Whenever you cast an instant or sorcery spell from your hand, manifestmanifestPut that card 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. the top card of your library. (Put that card 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.)
Whenever a face-down creature you control diesdiesA creature dies when it goes from the battlefield to a graveyard. Being exiled or returned to hand is not dying., exile it if it's an instant or sorcery card. You may cast that card until the end of your next turn.
Hover an underlined rule to see what it means.
Read from the rules text. A card that enables a keyword makes or is the thing; a card that rewards it gets better when you have it. Two cards interact when one enables what the other rewards.