Orzhov Ascendancy

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 a spell, create X Treasure tokens, where X is the number of times that spell
was extorted.
Whenever one or more creatures attack you, their controller loses life equal to the number of
Treasure tokens you control.