Source: Dragon #304
During your indoctrination into the Legion, the psychic surgery used to change your alignment and purge your memories altered your psyche. As a result, spells designed to affect a creature's mind sometimes fail to work on you.
Prerequisite: Member of the Nameless Legion, Wis 13+.
Benefit: You gain spell resistance equal to 10 + your Wisdom modifier against all mind-influencing spells. The spell resistance granted by this feat does not stack with any other spell resistance the character already has.
Special: If you are no longer a member of the Nameless Legion, you do not lose access to this feat.