Arna Kennerüd, Skycaptain

Counter doubling and permanent copying in one attack trigger: the design reads like two payoffs stapled together, but they resolve as one continuous escalation. Any modified creature that swings gets its counters doubled, +1/+1 counters most often but oil, charge, and every other kind alike, and then each Aura or Equipment attached to it is duplicated as a token copy stuck onto the same creature. The word "modified" is doing the heavy lifting: it keys off a state most decks already assemble incidentally rather than off a narrow keyword, so an attacker wearing a single Equipment qualifies as readily as one holding a stack of counters. The doubling is where the real compounding lives, since it applies fresh on every attack; the copying half only ever duplicates nontoken permanents, so the tokens it makes sit out of the next trigger's math rather than snowballing on top of it. The rest of the frame is built to survive the turn cycle that engine demands: flying and lifelink stabilize the race while the counters climb, and Ward that costs a discard rather than mana taxes removal without giving the opponent a fixed price to plan around. This is the payoff that voltron and +1/+1-counter decks had long assembled from separate pieces, leaning on Doubling Season for the counter half and standalone copy effects for the attachments; folding both halves into a single attack trigger on a body that flies and gains life is the synthesis those decks had been approximating.