Tenacious Hunter

A 4/4 for four mana is a respectable green body, but the conditional keywords are the entire pitch, and they only switch on once -1/-1 counters are scattered across the battlefield. The wither-and-attrition style of play, where counters land from combat-shrinking effects, fight spells, and dedicated counter-makers, turns this into a creature that wants the board to be sick. Vigilance and deathtouch are exactly the pair that punish a wounded opponent: deathtouch means anything it bites dies regardless of remaining toughness, and vigilance lets it swing in while still holding the fort against the swing-back. The subtle move in the design is that it keys off a -1/-1 counter on any creature, not just itself: your own attrition spells, an opponent's shrinking effects, even a single counter dropped onto a token elsewhere flips the switch. That phrasing makes the payoff communal rather than self-contained, which is what asks you to commit to the subtheme instead of treating this as a generic four-drop. Build a board that reliably seeds -1/-1 counters and you get a threat that is nearly impossible to attack into and nearly impossible to block profitably; play it on an empty, healthy board and it is a vanilla 4/4 waiting on the rest of the package. The card is the closer that justifies the whole counter shell, not the reason to build one.