Vigorspore Wurm

Undergrowth mostly pays out its graveyard count as a flat, safe value: tokens, life, a counter or two on the body that carried the trigger. This one routes the payoff sideways, dumping the entire creature-card tally onto a single attacker as a temporary +X/+X plus vigilance, which converts a midrange grind into a one-turn pump spell strapped to a 6/4. The buff going on any creature, including itself, is the wrinkle worth sitting with: after a game of trading bodies, the count is large, and the recipient does not have to be the Wurm. The "can't be blocked by more than one creature" clause is what makes the redirect dangerous on its own terms, since a body that forces single blocks already wants to connect, and a graveyard's worth of stats means the chump-block math rarely favors the defender. The design tension is timing: Undergrowth fires once, on entry, so the payoff is front-loaded and the graveyard count is locked the moment it resolves. There is no rebuying the trigger, no instant-speed flexibility, only the question of whether you have buried enough fodder to make six mana convert into lethal in a single combat step.