Type of Feat: general (available every three level-ups)
Prerequisite: Dex 13+, Int 13+, Armor Proficiency (light)
Specifics: Allows you to use your intelligence modifier in addition to your dexterity modifier for AC if using light armor, a rapier or shortsword, and nothing in your offhand (including shields or weapons). To a maximum of your level.
Use: automatic.