Bartz and Boko

Affinity has almost always lived in artifacts: the mechanic that turned a hand of noncreature permanents into a cost reducer and, in its first outing, warped a format around its speed. Grafting it onto a creature type is the pivot here. Every Bird on the board shaves a generic off the cost, so a green go-wide board that would ordinarily be paying full price gets to deploy a five-mana body at a steep discount and, on arrival, converts the flock's accumulated power into removal. The enters trigger is the reward for having already built the board: each other Bird you control fires its power at a single opposing creature, which reads less like a fight and more like a coordinated volley. That sequencing matters. The card contributes nothing to its own trigger (the 4/3 does not join the barrage), so the payoff scales entirely with what preceded it, and the discount and the damage draw from the same well: the wider the wing, the cheaper the play and the harder the hit. It is a tribal payoff that rewards commitment on both axes at once, which is a cleaner fusion of affinity and go-wide than the mechanic's history would suggest, given how often affinity has been about permanents that do nothing but count.