You have a strong code of conduct and stick to it against any contrary judgment.
Benefit: You are immune to any magic or effect that would change your alignment from lawful to neutral or chaotic. If a mind-affecting power would force you to act against your alignment, you gain an additional saving throw with a +4 bonus. Also, you enjoy a +1 competence bonus to all saving throws against spells with the chaotic descriptor and against the special abilities of creatures with the chaotic descriptor. If you are ever about to willingly commit an unlawful act, the Games Master may warn you of the consequences and you must succeed at a Will save (DC 10 + character’s level) to continue with that course of action.
Undefeatable: The Collected Feats Sourcebook, Copyright 2009 – 2010, Louis Porter Jr. Design, Inc. Undefeated, Copyright 2011, Louis Porter Jr. Design, Inc.