Eidolon of Astral Winds

The constellation trigger here doesn't grant a permanent buff: it rewrites one creature into a 4/4 flier until end of turn, then hands the numbers back. That temporary framing carries the whole design. A standing anthem scales with your board; this concentrates every enchantment you play into a single evasive attacker for one turn. Because the effect is a full base-power-and-toughness override rather than a bonus, it can rescue a creature that's been shrunk, or vault a small token into a relevant flying threat, before returning it to size on the crackback. Every enchantment entering fires the trigger, not only this Spirit itself, so the payoff front-loads onto flooding the board with cheap enchantments rather than assembling one durable engine, and it rewards sequencing those enchantments around combat rather than dumping them out whenever. The vigilance belongs to the 2/4 body: it lets this creature turn sideways as the beneficiary of its own trigger, swinging as a 4/4 flier while staying up to block, which matters most in mirrors where both sides are racing in the air. Where most white constellation payoffs hand out a modest standing bonus per trigger and reward enchantment density over card quality, this one bets entirely on the burst: a repeatable, single-turn evasive finisher that lives or dies by how many enchantments you can land in a turn.