Fruit of the First Tree

The payoff is keyed to toughness, not power, and that inversion drives everything the Aura wants to do. Most green Auras chase the attack step; this one wants the creature to die, and specifically wants the highest-toughness body in your pool to die, since both the lifegain and the card draw scale off that number. It answers the classic two-for-one trap of any Aura: spend a card to enchant something, lose both if the creature gets removed. Here that math flips. Cheap removal pointed at your enchanted creature becomes a gift, since death is the trigger, and chump-blocking a fat defensive body turns into a refuel. The natural home is a high-toughness wall that blocks all day: enchant it, dare the opponent to interact, and collect the difference when it hits the graveyard. The trigger is narrow, though, and worth respecting: it cares about death, a creature moving from battlefield to graveyard, so an opponent who exiles or bounces the body answers the Aura without paying you a thing. The tax on the whole plan is a four-mana sorcery-speed setup against an instant-speed payoff you do not control: you commit the Aura now and wait for a death you cannot always force, so the engine rewards decks already built to sacrifice or trade their creatures rather than ones hoping the opponent obliges. It is recursion-adjacent value dressed as an enchantment, paying out in a color slice that rarely gets to draw cards in bulk.