Rather than pay {2} for each previous time you've cast this spell from the command zone this game, pay 2 life that many times. Flying, lifelink Whenever a player casts a spell, they lose 2 life.

Flying, lifelink Whenever another nontoken creature you control dies, return that card to its owner's hand at the beginning of the next end step. If a creature an opponent controls would die, exile it instead.

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 nontoken creature dies, you lose 1 life and create a Treasure token.