This crystal is black as a clouded night sky.

A crystal of mind cloaking protects you against mental infiltration.
This augment crystal grants you a +5 competence bonus on saving throws against mind-affecting spells and abilities. In addition, if you fail a save against a mind-affecting spell or ability, you can choose to reroll the save as an immediate (mental) action.
This ability functions once per day.

Prerequisites: Craft Magic Arms and Armor, resistance.
Cost to Create: 5,000 gp, 400 XP, 10 days.