Dust of Deterioration

Dust of Deterioration was a poison reagent used by rogues to create poisons that could damage their enemies and slow the casting of spellcasters.

Source
Sold by poison vendors.

As an ingredient
Dust of Deterioration was used in the following recipes:


 * Instant Poison (item) (III, IV, V, and VI)
 * Mind-numbing Poison (item) (III)