Crookshank Kobolds
Free to cast, free to ignore: the 0/1 body folds to almost any interaction, and deploying it still costs you a card. The design only resolves in the presence of a payoff, and the Kobolds shipped alongside theirs in the same set: tribal lords like Kobold Overlord and Kobold Drill Sergeant that turn a wide board of free 0/1 bodies into a beatdown. What scans as filler is actually the substrate for one of the earliest dedicated tribal-aggregate suites the game ever assembled, a coordinated batch of free creatures meant to be flooded onto the table en masse rather than a stray one-off. The template has recurred since: Memnite, Phyrexian Walker, and Shield Sphere all sit on the same axis the Kobolds occupied, trading a card for a board presence that only matters in aggregate. The rules baggage is part of the legacy too; a zero in the mana cost was novel enough that it took years of templating to settle how free spells behave under cost modification and alternative costs. The least interesting card in the cycle to read, and one of the more interesting ones to think about.
