Thriving Rhino

Energy was always a self-balancing currency: every card that produced it threatened to also spend it, and the better designs forced you to choose. This one builds its own meal and then asks whether to eat it. The two counters it generates on arrival are exactly the two it wants to spend on its first attack, so the default line is clean: a 2/3 that swings as a 3/4. But that symmetry is the whole tension. Energy is a shared pool, and the rhino's growth competes directly with every other sink in the deck, the payoffs that wanted those same counters to draw a card, deal damage, or fuel something larger. Holding back the pump to feed a bigger engine is a real cost, and pumping it for incremental board presence is a real opportunity lost. As a green common, it does the quiet work of keeping the energy economy honest: it hands you resources, then immediately offers to take them back for a modest, repeatable return, teaching the curve where the marginal counter is best spent. The body is unremarkable and the rate is fair on purpose; the interesting decision is never about the rhino itself but about everything else competing for its fuel.