You can enhance your spells with the power of Asmodeus, making them more deadly to those who oppose his infernal will.
Benefits: An unholy spell has a different function depending on the target. Good creature’s take a -2 penalty on any saving throws made against an unholy spell, while evil creatures gain a +2 bonus on such saving throws.
In addition, if the spell deals damage, half the damage is considered unholy damage, which bypasses any resistances the target might possess. If the saving throw reduces the damage, if halves the unholy damage and the normal damage.
An unholy spell takes up a spell slot one level higher than the spell’s actual level.
Way of the Wicked Book Five — The Devil My Only Master. Copyright 2012, Fire Mountain Games LLC; Author: Gary McBride.