Laced with positive energy, positoxins are special alchemical mixtures that can effect undead. Positoxins effect corporeal undead as poisons effect the living. Positoxins are able to effect an undead's physical abilities (strength and dexterity). It serves to cancel the negative energy that imbues and undead while physically breaking down its physical structure. As such, strength and dexterity positoxin damage to an undead is a drain and therefore feared by intelligent undead.