Power of the Pit (Su)
At 20th level, your form becomes infused with vile power. You gain immunity to fire and poison. You also gain resistance to acid 10 and cold 10, and the ability to see perfectly in darkness of any kind to a range of 60 feet.
Undead The taint of the grave runs through your family. Perhaps one of your ancestors became a powerful lich or vampire, or maybe you were born dead before suddenly returning to life. Either way, the forces of death move through you and touch your every action.
Class Skill: Knowledge (religion).
Bonus Spells: chill touch (3rd), false life (5th), vampiric touch (7th), animate dead (9th), waves of fatigue (11th), undeath to death (13th), finger of death (15th), horrid wilting (17th), energy drain (19th).
Bonus Feats: Combat Casting, Diehard, Endurance, Iron Will, Skill Focus (Knowledge [religion]), Spell Focus, Still Spell, Toughness.
Bloodline Arcana: Some undead are susceptible to your mind-affecting spells. Corporeal undead that were once humanoids are treated as humanoids for the purposes of determining which spells affect them.
Bloodline Powers: You can call upon the foul powers of the afterlife. Unfortunately, the more you draw upon them, the closer you come to joining them.