Rezmon, the Adulterator

{u/r}{u/r}, Discard two instant or sorcery cards: Reveal cards from the top of your library until you reveal an instant or sorcery card with converted mana cost equal to one of or between the discarded card's converted mana cost. You may cast that card as though it had flash without paying its mana cost. Shuffle all other cards revealed this way into your library.