Hellsworn( Exemplars of Evil, p. 24)
You have made a pact with a foul devil from the Nine Hells. In exchange, you can channel the power of that dreadful plane.
You gain the extraplanar subtype. Your native plane is now the Nine Hells of Baator, and you can select
one of the following infernal gifts.
Hell's Fury: Once per round, as a free action, you can designate a single target that you can see. Your melee attacks and ranged attacks against that target—if made with a weapon for which you have the Weapon Focus feat—deal an extra 1d6 points of unholy damage.
Brimstone Caress: When casting spells or spell-like effects that have the evil descriptor, your caster level increases by 1. Once per encounter, you can increase the save DC of any spell you cast by 1. If the spell deals damage, half the damage dealt is unholy.