Life's Legacy

Two mana converts a creature's power into a fistful of cards, with the catch that you feed that creature to the spell first. The design knot is that the sacrifice is an additional cost, not an effect: it happens on cast, before the spell can be answered, so a removal spell aimed at your fattest attacker no longer denies you the payoff. Aim it at a creature whose enters-the-battlefield value is already spent, or one you wanted off the board for reasons beyond the cards, and the draw is profit. The natural partners are creatures that pile a big number into the power slot for cheap (the Tarmogoyf school, or any token-doubling that hands you a single oversized body). What restrains it is that toughness, abilities, and board presence all evaporate in the exchange: you are paid strictly for power, so a 7/1 draws as much as a 7/7, and the spell punishes you for sacrificing the wrong thing as readily as it rewards the right one. The sorcery restriction also locks the trade to your own main phase, so it can't catch a blocker mid-combat the way an instant-speed sacrifice like Momentous Fall can. This is green's answer to a question black usually fields with Altar's Reap and Village Rites: turn a permanent into raw cards. Green just insists you pay in a body it was already happy to throw away.