Oshringr, Voice of Vastwood

Flying
Wilderness Lore (When this creature enters the battlefield, reveal the top three cards of your library. Put all land cards revealed this way into your hand. Put the rest on the bottom in a random order. If a forest is revealed this way, put a +1+1 counter on this card.)
Whenever a land card is revealed from your library, you may put it onto the battlefield. If you do, gain 1 life.