Wartime Smuggler

When Wartime Smuggler enters the battlefield,
look at the top six cards of your library, exile one
face down, then put the rest on the bottom of
your library.
Whenever Wartime Smuggler deals combat
damage to a player, you may turn the exiled card
face up. If you do, you may cast it without
paying its mana cost if it's a creature or artifact
card, and you may return Wartime Smuggler
to its owner's hand.