Thezir, Extortionist Expert

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.)
Non-land permanents you cast have Extort and Flash.
When a creature you control enters the battlefield or graveyard you may have it trigger effects as though it entered a different zone.
When a creature you control enters the Graveyard