Quezri, Queen of Storms

Flying, ward {2}
Instants and Sorceries you control with Rebound,
gain Flashback equal to their cost plus {2}.
Whenever you cast an instant or sorcery from
your graveyard you may have it gain Gravebound
(If this spell would exile as it resolves from the grave-
yard for the first-time. You may exile it instead. At
the beginning of your next upkeep, cast it from exile
without paying its mana cost, then exile it.)