Monstrous Onslaught

Green's removal problem has always been the same: the color fights with bodies, not with spells, so the few burn-like effects it gets are routed through the creatures already on the board. This card leans all the way into that constraint. The damage pool is not a fixed number you pay for; it is whatever your biggest creature can hit for, so the card does nothing in a vacuum and scales toward a blowout once a fattie is down. That tether is the whole balancing act. You are not buying X damage with mana, you are converting power you already committed to the table into a one-sided combat resolution, and the five-mana sorcery price assumes you have something large enough to make the conversion worth it. The "divided as you choose among any number of target creatures" clause is where it parts ways from a fight spell or a bite effect: it functions as a board sweep priced for green's threats, capable of trading one creature's stats for several of theirs at once. Because the count is locked in as you cast, an instant-speed pump in response does not goose it; the math is settled the moment it hits the stack, which keeps the ceiling honest. It rewards the deck that was already winning the power race and offers almost nothing to the deck that was not, which is exactly how green is supposed to remove things.