Anya of the Surging Soul

At the beginning of combat on your turn,
each Merfolk 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 exploring creature, then put
the card back or put it into your graveyard.)
Whenever Anya of the Surging Soul attacks,
you may put a land card from your hand onto
the battlefield. If you don't, draw a card.