Under-worldly Cove

{t}, Sacrifice a creature: You may play an
additional land this turn.
{t}, Sacrifice a legendary permanent: Search your library for a basic land card, put it onto the battlefield, you may play an additional land this
turn.
{t}, Sacrifice a planeswalker: Search your library
for three land cards, put one onto the battlefield
tapped, one onto the battlefield untapped, and
one into your hand.