Wikia

Type of feat: Heritage
Prerequisite: 1st level Heritage Trait, Non Good Alignment
Required for: None
Specifics: You are descended from creatures native to the Lower Planes. You share some of your ancestors’ natural resistance to Poison, and you are resistant to the magic of good foes. You gain a +4 bonus on Fortitude saving throws against poison. You also gain a +1 bonus on saving throws against spells or other effects produced by good creatures.
Use: Automatic

Fiendish Heritage