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.
Upon selecting this feat; you immediately add one Knowledge skill of your choice to your list of class skills. Thereafter; you treat that skill as a class skill; regardless of which class you are advancing in. Whenever you fight a creature; you can make a Knowledge check based on its type; as described on page 78 of the Players Handbook; provided that you have at least one rank in the appropriate Knowledge skill.
You then receive an insight bonus on attack rolls and damage rolls against that creature type for the remainder of the combat. The amount of the bonus depends on your Knowledge check result; as given on the following table.
|Check Result||Bonus Granted|
|15 or below||+1|
|16 to 25||+2|
|26 to 30||+3|
|31 to 35||+4|
|36 or higher||+5|
You can use two lower-level spell slots to cast a spell one level higher.
You can use two spell slots of the same level to cast a spell you know that is one level higher. For example; a sorcerer with this feat can expend two 2nd-level spell slots to cast any 3rd-level spell he knows.
You are quick and certain in your efforts to defeat the arcane defenses and spells of others.
You can take 10 on caster level checks (as if the caster level check was a skill check). You can use this feat even while under stress.