Triad of Bane

Wither (This deals damage to creatures in the form
of -1/-1 counters.)
Whenever one or more counters are put onto creatures you don't control, their controller
discards a card unless they pay {1} and 1 life.
{b}{r}, Discard a card: Remove all counters from
target creature you don't control. Draw that
many cards. You lose that much life.