Alright then, how are these for a baseline? I took fireball as a main focus, then lowered the range in order to make up for the cone effect. Feel free to correct me on the meaning of unholy damage if I got it wrong (I've been mired in non-evil creatures for a while)
Poison (Ex?): Anyone bitten by Baal-phegor must make a Fortitude save (DC 30) or contract a horrid poison (initial damage 1d4 Wisdom, secondary 1d6 Wisdom).
Hellfire (Su): Three times per day, Baal-phegor may unleash a blaze of hellfire from his vicious maw. This is a 50-foot cone that deals 5d6 points of fire damage, as well as an additional 5d6 points of untyped damage to a creature with an allegiance to good. A successful Reflex save (DC 26) halves damage.