Millicent, Restless Revenant

Affinity was born as an artifact mechanic, a way to make spells cheaper by counting permanents you already had on the battlefield; grafting it onto a tribe turns that same discounting engine into a tribal payoff. The seven-mana printed cost is a fiction the deck is built to erase: with a board of Spirits, this arrives well ahead of curve, and each nontoken Spirit you control is both a discount and a trigger source. That double duty is the design's cleverest turn. The token engine doesn't ask for a sacrifice outlet or a dedicated combat step to matter; it fires on two of the most natural things a creature does, dying and connecting, and it reads nontoken Spirits so the 1/1s it makes cannot feed themselves into a runaway loop. That single word, nontoken, is what keeps a symmetric-looking trigger from spiraling: your fliers make more fliers only when the real bodies do work, so the board grows through combat and attrition rather than by itself. It sits at the head of a specific white-blue lineage, the go-wide Spirit build that wants evasive small bodies and a payoff that scales with them, and it answers that deck's central problem, how to keep the flock replenishing after blockers and removal thin it out, by making every exchange a fresh token. The flying body closes on the same axis it fills the air with.