Vira, Alia's Chosen

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.)
When Vira, Alia's Chosen enters the battlefield, gain life equal to the number of Gold tokens you control.
Sacrifice 10 Gold tokens: Each opponent loses 5 life. You gain life equal to the total life lost.