Chaos Devotion( Complete Champion, p. 56)
The forces of chaos assist you in combat.
Once per day as a swift action, you can summon the force of chaos to aid you. When you activate this ability, roll ld6. If the result is odd, add that number as a sacred (if your deity is good or neutral) or profane (if your deity is evil) bonus on your attack rolls until your next action. If the result is even, add that number as a sacred or profane bonus to your AC. At the beginning of each action thereafter, roll the die again and apply the designated bonus. This effect lasts for 1 minute. When you attain 10th level, the die you roll increases to a d8. When you attain 15th level, the die increases to a d10.
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.