Darkthicket Wolf

A two-drop that bluffs better than it bodies. On an empty board this is a 2/2 that can become a 4/4 once per turn, and the entire decision space lives in when you reveal that. The single-activation clause is what keeps it from being a mana sink that swallows a whole turn: it grants exactly one swing of leverage in combat, then asks you to commit your remaining mana elsewhere. So it becomes a creature built around one decisive trick (ambush a smaller attacker, push the point of damage that ends a race, or trade up into something a vanilla 2/2 would lose to outright) rather than a recurring engine. Green has a long tradition of bodies that grow at instant speed to win combat: Watchwolf hands you the rate up front, this hands it to you on demand, and the once-per-turn restriction is the price for putting that flexibility on a two-drop. Nothing is concealed in the text; the value lives in deciding whether the green and two generic are better spent on a second-main-phase threat or a profitable block, and in disguising which combats you actually intend to win. A green deck full of these makes every attack and every block a question the opponent has to answer without the math in front of them.