Thriving Turtle

A 0/3 wall that arrives carrying its own fuel: the energy it nets on entry is exactly enough to size up once in combat, which is the quiet trick that turns a defensive body into something that can attack into open boards. The design problem with a one-mana 0/3 is that it does nothing on offense, and energy solves that without committing the card to a single role. Hold the counters and it blocks all day; spend them and it becomes a 1/4 that keeps growing as you funnel more energy in from elsewhere. That second clause is the real hook, because the energy economy in this archetype is shared: every Voltaic Brawler swing, every Aetherworks Marvel spin, every Harnessed Lightning draws from the same pool, so the turtle is both a producer that front-loads two counters and a consumer that wants more. It scales with how deep the deck commits to the resource rather than its own line of text. As a self-contained card it is modest; as a node in an energy build it is the cheap, durable battery that smooths the curve and gives the deck a body that can do real work on either side of the combat step depending on what the board asks for.