Siris Nathrol, Arcane Whisper

Flying
At the beginning of your upkeep, reveal the top card of your library. Whenever you reveal a creature card this way, you may exile it. If you do, you may cast target instant or sorcery card from your graveyard this turn without paying its mana cost. Exile it. Whenever you reveal an instant or sorcery card this way, you may cast a creature you own from exile this turn. If you do, discard your hand.