Merrow Pathfinder

Whenever Merrow Pathfinder deals combat damage to a player, that player reveals the top three cards of his or her library. You may put all land cards revealed this way onto the battlefield tapped under your control. Put the rest into that player's graveyard.
{2}{g}, Return a land you control to its owner's hand: You gain 1 life for each land the owner of the returned land controls.