This spell is a part of the Air's Constant Flow spell chain and can be found in the Air's Constant Flow rune stone.
There is a version of this magic the aeromancer learned first for themself - the private mask, the breath held and shaped and handed to one person at a time. Seal of the Airs is what happens when that same quiet care stops being personal and becomes something shared. Not a mask this time, but an atmosphere: the aeromancer reaches into the air around their whole party and, with just a little help from their connection with the West Wind, makes it belong to them a little more than it did a moment ago.
Cast this way, the spell settles evenly over every ally at once, deepening whatever connection each of them already carries to the air element and doubling its benefit - sharper magical offense, sturdier magical defense, quicker feet for everyone regardless of what runic element they were actually born under. Anyone who had no natural claim to air at all is quietly given one anyway, a borrowed foothold in a power that was never theirs to begin with given only by the constant presence of the West Wind. And for anyone who counted air as a weakness rather than a strength, that weakness simply stops mattering for as long as the spell holds. The one person left untouched by all of it is the aeromancer themself - this was never a gift meant to come back around to them, and by now, they don't really expect it to.
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