Indomitable Discipline( Player's Guide to Eberron, p. 86)
Many aberrations in Khyber possess powers allowing them to control the minds of lesser creatures. Your strict mental discipline allows you to resist attempts to manipulate your thoughts.
Adar, Eldeen Reaches, or Riedra, Region of origin Shadow Marches,
You receive a +3 bonus on saving throws again charm or compulsion effects, or any other effect that would give another creature control of your thoughts (such as an aboleth's enslave ability).