PIXIE DUST RECIPE
FEY SECRET – FLIGHT POWDER
When a Pixie dies a violent death, it’s body instantly desiccates into a fine powdery substance. If this "dust" can be caught by metal before it touches anything else the magic contained in the Pixie's tissue is preserved. A "sprinkle" of the powdered tissue (known colloquially as "Pixie Dust") can be used to temporarily grant the power of flight. The powder itself will keep potency until the next full moon in the mortal realms (or indefinitely in the twilight realms) after which is becomes unpredictable.
For the magic to be preserved at all the powder must be kept in a container made of the skin of a mortal being for which mortals tend to use a simple leather pouch. The Fey do not.