Longbeard Ranger

Forestwalk, mountainwalk (This creature can't be blocked as long as defending player controls a Forest or Mountain.)
Whenever Longbeard Ranger attacks, it 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.)