Fiendish Skin (3.5e Feat)
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Fiendish Skin [Abyssal Heritor]
You grow a thick, leathery skin that protects your frail body.
Benefit: You gain a +1 natural armor bonus, +1 for every three Abyssal Heritor feats that you have.
Special: With the additional weight that is not fully supported by your frame, you are somewhat slower, and suffer a -2 penalty to initiative.