Enemy of Good
(Elder Evils, page 13, DnD 3.5)
[Vile]
You draw power from your unholy devotion.
Prerequisite
Chosen of Evil, Evil Brand
Benefit
Whenever you cast a spell or use a spell-like ability against a creature of the good subtype or a creature that radiates an aura of good, the save DC, if any, increases by 2.