Orzhov Aristocrat

Extort (Whenever you cast a spell, you may pay {w/b}. If you do, each opponent loses 1 life and you gain that much life.)
Whenever you extort, target opponent may choose to put a -1/-1 counter on a creature they control. If they don't, you may put a +1/+1 counter on a creature you control.

"You've made a wise decision, my friend."