Book of Vile Darkness 3.5
By Monte Cook
Over the course of one day, the caster takes a subject already in great pain’ wracked with disease, the victim of torture, or dying of a wound, for example and captures its pain in liquid form. This physical manifestation of agony can be used to create magic items or enhance spells. It can also be used as a potent drug.
Focus: A jar, vial, or other container for the liquid pain.