Hellsworn

(Exemplars of Evil, page 24, DnD 3.5)

[Vile]

You have made a pact with a foul devil from the Nine Hells. In exchange, you can channel the power of that dreadful plane.

Prerequisite

Evil Brand, Weapon Focus, Knowledge (the planes) 9 ranks, Evil

Benefit

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.

Special

If you are slain, your soul is dragged to the Nine Hells of Baator. You cannot be restored to life by any means short of a "_miracle_":spells/players-handbook-v35--6/miracle--2633/ or "_wish_":spells/players-handbook-v35--6/wish--2902/ spell.