Kitsune Mystic // Autumn-Tail, Kitsune Sage

The flip condition reads like a puzzle Aura decks were already trying to solve: stack two or more Auras on a single body, survive to the end step, and a modest 2/3 Fox Wizard becomes a legendary engine. Auras are the most card-disadvantaged way to buff a creature in the game, since a single removal spell two-for-ones you, so a payoff that asks you to double down on the worst attribute of Auras has to give something real back. Autumn-Tail does: for one mana each, repeatedly, it moves any Aura attached to a creature onto another creature, turning the most fragile permanent type into a portable toolkit. Pacifism slides off a stalled blocker and onto your opponent's next threat; your own enchantments shuffle out from under removal in response. The back face answers the central fragility of an Aura-based strategy, and it does so through a creature that earns that answer only by leaning all the way into the fragility first. The whole arc is the work: you accept the two-for-one risk on the front, and the flip rewires what Auras can do. Few designs from this era committed so fully to a single mechanic's downside as the price of its upside, and fewer still resolved it cleanly enough to make the payoff feel earned rather than punitive.