Oops, looks like the claws are supernatural...I thought they were extraordinary, but that only applys to passive stuff (demon resistances, strength of the abyss). That does bring up an interesting thing, however. The 20th level bloodline power for an Abyssal sorcerer is supernatural, meaning someone could use antimagic to remove the immunity to electricity and (more importantly) poison...oo, I'm getting some dirty ideas for other campaigns I'm in...