Philibert, Great Ringmaster

{w}{u}{b}{r}{g}, {t}: Choose a card type. Exile cards from the top of your library until you exile a card of the chosen type. Until end of turn, you may cast that card without paying
its mana cost. Put the other exiled cards on
the bottom of your library in a random order.

"Let's see what else will come from behind the curtains!"