Laban's Covenant

When Laban's Covenant enters the battlefield,
each player chooses a basic land type. Then each
player searches their library for a basic land card
of the chosen type and puts it onto the battlefield tapped. Then each player shuffles.
At the beginning of each player's upkeep, that
player may exchange control of a land they
control and a land an opponent controls that
shares a type. If they do, each player who
exchanged a land this way draws a card.