Yorvo, Lord of Garenbrig

A self-scaling growth engine that reads its own board state before deciding how much to grow. It arrives already sized up, then compounds: every other green creature that follows adds a counter, and any that enters with more power than the giant adds a second. That conditional second counter is the design wrinkle, because it turns a mono-green go-wide board into a size race the commander keeps winning. The catch is that the giant's own power is the moving target it measures against, and it starts high. Early bodies (a one-power mana dork, a two-power beater) never clear that bar, so they only ever chip in a single counter; it takes a genuinely large green creature entering later to earn the bonus, and the window for that shrinks as the giant pulls further ahead. What holds the card in check is that all this heft comes with nothing to protect it: no evasion, no trample, no resilience, just a swelling green mass that one removal spell erases along with every counter you fed it. The trigger keys strictly on green creatures, too, which quietly disqualifies the artifact tokens and colorless ramp mono-green so often leans on. A pure tribal-color reward, built so that committing more green bodies feels like it snowballs, provided you keep replacing what dies faster than the opponent can answer the giant.