Subterranean Schooner [The Lost Caverns of Ixalan Prerelease Cards]

Cost: 1 U Whenever Subterranean Schooner attacks, target creature that crewed it this turn explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a 1/ 1 counter on that creature, then put the card back or put it into your graveyard.)
Crew 1