Sazba, Rot-cave Gleaner

When Sazba, Rot-cave Gleaner enters play,
choose target card in your graveyard with mana
value three or less. If it's a permanent, put it
onto the battlefield. Otherwise put it into your
hand.
At the beginning of your end step, if Sazba is in
your graveyard you may sacrifice two lands. If
you do, return Sazba to your hand and you gain
3 life.