Moment of Midnight

You may cast Moment of Midnight only at the beginning of an end step.
Each opponent loses 3 life unless he or she sacrifices a creature. You gain life equal to the
life lost this way.
Recurrence - At the beginning of each end step, if Moment of Midnight is in your graveyard, you
may pay {b}. If you do, return Moment of
Midnight from your graveyard to your hand.