Your internal organs are misplaced, take different forms, or are missing entirely, reducing the ability of your enemies to inflict grievous harm.
Prerequisites
Aberrant Bloodline, any two other Aberration Feats.
Benefit
You gain resistance to precision damage and critical hits. This functions as the fortification armor ability, except that the chance to negate a critical hit or precision damage is equal to 5% per Aberration Feat you possess.
This does not stack with the armor ability.