The Izzet Prodigy

Flying
You may cast sorcery spells as though they had
flash
Whenever you cast an instant or sorcery spell, you
may pay {x}. If you do, exile cards facedown from
the top of your library until you exile an instant
or sorcery card. Put that card into your hand and
a permanent card with mana value X or less from
among cards exiled this way onto the battlefield.
Then return all cards exiled this way to the
bottom of your library and shuffle.