Slave to Evil

Prerequisite(s): Chosen of Evil
Benefit: You gain an aura of evil as if you were an evil outsider. Whenever you are the target of an evil spell, decrease all variable numeric effects of the spell to their minimum possible values. In addition, your abilities increase with the intensity of your master's sign. All effects are cumulative.
Faint: You gain a +2 profane bonus on saves against divine spells.
Moderate: You gain a +1 insight bonus on attack rolls and damage rolls against divine spellcasters.
Strong: You gain spell resistance equal to 11 + your character level against divine spells. If you already have spell resistance, it increases by 5 against divine magic.
Overwhelming: All divine spells cast within 30 feet of you are impeded, meaning that a divine spellcaster must succeed on a Spellcraft check (DC 20 + spell level) or lose the spell or spell slot with no effect.
Source: Elder Evils