Map of the Uncharted

Each creature you control gains: "{1}{t}: This creature 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 this creature, then put the card back or put it into your graveyard.)"
"Who knows what untold treasures lie forgotten in these lands."
-Marlo Kethlianer