A-Tenured Inkcaster

The counter payoff is the whole engine here, but the reward is deliberately built on attack triggers rather than on the counters themselves. A creature has to carry a +1/+1 counter and swing for the drain to fire, which turns the whole board into a life-swing clock the moment counters start accumulating: not the counter matters, but the counter attacking. That framing matters because it pushes the deck away from static plus-one-plus-one value and toward a go-wide aggro shell where every counter-bearing body is a repeatable Gray Merchant trigger on the crackback. The enters ability seeds the loop by handing out one counter, so the card provides its own on-ramp before asking the rest of the deck to widen the effect. Structurally it sits in the aristocrats-adjacent lineage of black creatures that convert a board presence into incremental drain, but the trigger condition is the wrinkle: it rewards the attack step specifically, so it wants a proactive counters deck rather than a grindy sacrifice one, and it punishes the opponent for letting counters live on the battlefield. It does not do much in a vacuum: one counter and a modest body is a slow start. Its ceiling depends entirely on how many counter-carrying attackers the surrounding deck can field, which is exactly the design tension: a payoff whose rate is set by the archetype it anchors rather than by anything printed on the card.