Tales of Tolgard
dust of disappearance
Dust of disappearance is a controlled substance in most civilized lands on the Material Plane. This does not, however, stop shops that carry it from doing a brisk business. The problem, of course, is that local constabularies have a difficult time with roguish folk that use this powder to commit nefarious deeds.
The dust itself, poured on a person, rendering them invisible for a short while. This is no minor invisibility effect, however, and not only allows the dusted person to engage in offensive activities while remaining hidden, it also proves rather resistant to many types of magical dispelling. This dust is truly a dangerous magic item in the wrong hands.