Enter the Unknown (RIX) from Rivals of Ixalan, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Howard Lyon
• Card Text:
  Target creature you control 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 the creature, then put the card back or put it into your graveyard.)
  You may play an additional land this turn.