Cleric Utility 16Cloak of Peace
You utter a prayer, placing a mantle of faint silvery light upon yourself or an ally. The mantle repels attacks as long as its wearer doesn’t attack.
Standard Action Ranged 10
Target: You or one ally
Effect: The target gains a +5 power bonus to AC and a +10 power bonus to all other defenses until the end of the encounter. These bonuses end if the target makes an attack.
Published in Player's Handbook, page(s) 68, Class Compendium.