Sanctum of None

At the beginning of your precombat main phase,
each opponent sacrifices a creature for each
shrine you control.
At the beginning of your end step, if you control
six or more shrines, you may exile Sanctum of
None. If you do, each opponent exiles their
graveyard and loses life equal to the number of
creatures exiled from their graveyard.
—Sorrow for all.—