Kadish, Sister of Izzet

Flash, Flying, Hexproof
{u/r}{x}{x}{t}: Play all instants and/or sorcery card in your graveyard with x or less without pay
its convotered manacost. If they would be put into your graveyard this turn exile them.
{u}{u}{r}{r}: Return target instant and/or sorcery from exile to your hand.