Vara Spadget, the Collector

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 a creature you don't control dies, if it's controller has lost 3 or more life this turn, exile it.
Whenever a creature you control dies, if you have gained 3 or more life this turn, put a creature exiled with Vara Spadget, the Collector onto the battlefield tapped under your control.