Force of Personality

(Complete Adventurer, page 109, DnD 3.5)

[General]

You have cultivated an unshakable belief in your self-worth. Your sense of self and purpose are so strong that they bolster your willpower.

Prerequisite

CHA 13

Benefit

You add your Charisma modifier (instead of your Wisdom modifier) to Will saves against mind-affecting spells and abilities.