Fiendish Resilience

Feats

At 2nd level, a fiendflesh shifter gains a +1 natural armor bonus to her AC and resistance 5 to electricity and fire, but only while unencumbered and either wearing no armor or wearing light or medium nonmetal armor. At 4th level, 12th level, and 20th level, this natural armor bonus increases by 1. At 8th level and 16th level, the fiendflesh shifter's resistance to electricity and fire increases by 10. This replaces defensive instinct.

Fiendish Resilience — Feats | Pathfinder: WotR Database