Prowcatcher Specialist

Attack the turn it lands, then let it grow when the beatdown runs out of gas. A 2/1 with haste is priced to press early damage before anyone has a blocker, and that is where the body earns its keep. The mana sink is the second act: four mana, spent once, turns this into a 4/3 that a spent hand can still deploy when the game slows and the extra lands would otherwise sit idle. The "activate each exhaust ability only once" clause is what keeps the upgrade from becoming a grind engine; it is a single, permanent conversion of surplus mana into board presence, not a repeatable pump you hold up every turn. That split is the point. Early, the haste wants you attacking, not sitting back to represent the sink; late, when the haste is dead weight and the counters are the only relevant thing the card offers, the pump gives an aggressive deck a reason to keep drawing rather than flooding into a stall. It answers a persistent problem with cheap aggressive creatures: what they do once the curve is spent and the board has locked up. The math stays simple, four mana for two counters, and the design leans on the early tempo to justify the body long before the sink ever comes online.