Crescent Guest

Flash, flying
Foretell {5}{b/r} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)
Whenever you cast Crescent Guest from exile, you may look at target face down card in exile. Until end of turn, you may cast it if it's a spell as though it has flash and as though it were foretold.