Deformity - Madness

Prerequisite(s): Willing Deformity
Benefit: You take a permanent 4 profane penalty to your Wisdom score to become immune to all mind-affecting spells and abilities. As an immediate action, you can derive clarity from your madness to add a bonus equal to one-half your character level to a single Will save. Make this decision before determining the results of the saving throw. You must wait 1 minute before you can take this action again.
Source: Elder Evils