Predatory Rampage

The forced-block clause is what turns a green pump spell into a finisher. A bare team buff lets the defending player decide combat: chump the biggest threat, take the rest, survive on a couple of points. By compelling every opposing creature to block if able, this strips that choice away. The defending player still distributes the blocks (they can gang up, spread out, or assign blockers however they like), but they cannot stand pat behind a wall; every legal blocker has to step into the path of some attacker. The math works because green's whole identity is putting more bodies on the table than the opponent can profitably trade with: when every defender must block but there aren't enough of them to cover a wide board, the surplus attackers connect for face damage while the chosen blockers die to the +3/+3 swing anyway. It is a one-card alpha strike that punishes the deck sitting behind defenders and waiting. The cost is the tradeoff: at five mana and sorcery speed, it cannot be held up as a trick or a bluff, so it asks the green deck to already be ahead on board before it resolves. That sorcery timing is also the only timing the effect can have, since a player only chooses blockers on the defending side; the forced-block clause is meaningless unless you are the one attacking. Anchored to your turn, it stays a payoff for the aggressor who has already done the work of going wide.