Powder of Power

Powder of power appears as opalescent sand; when a handful is thrown into the air and a command word is spoken, the powder erupts in a pulse of pure magical energy. This has no physical effect whatsoever.

Crime and Punishment
Author Keith Baker
Series Campaign Style
Publisher Atlas Games
Publish date 2003

However, it disrupts all traces of magical energy within a 30-foot radius. For purposes of Detect Magic, all magic auras with a rating of strong or below are erased; instead, the entire area is flooded with a single strong aura in the Universal sphere. If a spellcaster is studying the area using the detect magical residue spell, she can make a Spellcraft check (DC 15) to recognize that lesser auras may have been wiped clean. If a person or creature who is actively detecting magic is caught in the pulse, she must make a Will save (DC 15) or be stunned for 1d4 rounds. The powder is destroyed when it’s used.

Faint illusion; CL 5th; Craft Wondrous Item, Heighten Spell, magic aura; Price 250 gp