Stampeding Scurryfoot

A 1/1 that promises, exactly once, to convert a full turn's worth of unspent mana into four points of power on the board: a counter on the mouse and a 3/3 Elephant token beside it. That single-use ceiling is the whole design. An ordinary cheap-body mana sink offers a repeatable pump that scales into the late game as a permanent outlet for flood; the exhaust clause caps the activation at one, turning the four-mana payment from an engine into a one-time detonation. Without the cap, a one-drop that spat out a 3/3 every turn would simply run away with any grindy game; with it, the card becomes a deferred burst you hold for the swing turn rather than spend on curve, since there is nothing to bank toward. The math it changes is sequencing math. You do not activate to develop; you activate to break a stall or push lethal, because the ability is a resource you get to cash exactly once. As an expression of exhaust, it is unusually clean: a small creature that starts as a chump blocker and later answers the flooded-mana problem of go-wide green with a single, non-repeatable, top-heavy payoff. The restriction and the reward are the same gesture, which is why it reads more coherently than most cards carrying the keyword.