Irritable Sphinx

At the beginning of your upkeep, target opponent names a card. Then you reveal your hand. If the named card is revealed, return Irritable Sphinx to its owner's hand.
Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its
mana cost. Put the exiled cards on the bottom in a random order.)