Eyes of Malignity

If this card is in exile with a shadow counter on
it, you may cast it. If you do, it costs {2} less to
cast and when you cast it you lose 2 life.
At the beginning of each opponent's upkeep,
that player may discard a card. If they do, they
lose life equal to its mana value. If they don't,
you surveil 2.