Frissyn is a shimmering, silver powder made from Sasquatch Saliva, Quintessence, and a number of other ingredients. It is the only substance capable of extinguishing Everblaze, and it is the most difficult Alchemical Substances to create. It is noted to be extremely cold. Very few elves know the formula of Frissyn; Sophie Foster only knows the formula due to The Black Swan implanting it in her brain.

In Book 3: Everblaze, after Fintan sparked Everblaze in Oblivimyre, Sophie and Fitz bottled Quintessence to form Frissyn; This Frissyn was then used to extinguish the Everblaze destroying Eternalia.

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