Adaptive Sporesinger

Proliferate on a creature is rare, and stapling it to the enters trigger of a green body is the whole reason this card exists. The mechanic wants counters already on the battlefield to matter: +1/+1 counters, loyalty, poison, charge, oil, anything a deck has invested in. A green midrange creature does not usually generate those on its own, so the design bolts on a second mode that stands alone. The pump line (a temporary +2/+2 and vigilance handed to any creature) is the floor, the thing you take when the board holds no counters worth growing, and it keeps the card from being a dead draw in a deck that stumbled past its synergies. That modality is the balancing act: proliferate alone would be feast-or-famine, while a raw combat trick riveted to a 2/2 would be dull without the upside. The vigilance on its own body matters too, letting it apply attacking pressure without giving up a blocker on the swing back. What lifts it above its rate is how cheaply it folds proliferate into an existing curve: rather than spending a card slot on a dedicated proliferate spell that does nothing else, you get the effect on a permanent that also attacks, also holds the ground, and still contributes honest work on the turns the counter payoffs are nowhere to be found.