Dirtcowl Wurm

A growth engine that runs on the opponent's clock, which is a stranger design than the rate suggests. Most creatures that scale do so on resources you control: counters you pay for, cards you discard, lands you tap. This one offloads the trigger entirely to the other side of the table, turning the most routine thing an opponent does (making their land drop) into a tax. The tension is that the people most likely to keep dropping lands are the ones building toward something bigger, so the Wurm's size tends to track the threat level across the table: a slow control or ramp deck feeds it relentlessly, while a tapped-out aggressor that has stopped developing leaves it stranded at its printed 3/4. It rewards the green deck for being patient rather than proactive, an unusual ask for a five-mana beater. The body itself is the part the trigger fixes: a 3/4 for is below the curve on its own, and the counter mechanic earns the slot back over time rather than up front. It is a creature that punishes durdling, and against a deck that refuses to commit lands it simply sits there. That is the bargain you accept when you build a threat around someone else's choices: you only get paid when they cooperate.