Air Devotion( Complete Champion, p. 54)
You can defend yourself with the power of air.
Once per day as a swift action, you can shroud yourself in a mantle of air. This effect grants you a +1 sacred (if your deity is good or neutral) or profane (if your deity is evil) bonus to AC. This bonus increases by 1 for every four character levels you possess (maximum +6 at 20th level). In addition, thrown and projectile weapons have an automatic 50% miss chance against you while the air mantle is active. This protection lasts for 1 minute.
You can select this feat multiple times, gaining one additional daily use each time you take it.|||If you have the ability to turn or rebuke undead, you gain one additional daily use of this feat for each three daily turn or rebuke uses you expend.