I'd like to get ahold of the Undead Sorcerer bloodline's ability:
"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."
I was planning to do this through the Eldritch Heritage feats, until I realized it only gives me the first Bloodline power and none of the abilities. Is there any way to obtain this Arcana (aside from taking one level of sorcerer, of course)?