Feat UtilityArmor of Bahamut
Bahamut protects you or a friend from devastating harm.
Encounter Channel Divinity, Divine
Immediate Interrupt Ranged 5
Trigger: An enemy scores a critical hit against you or an ally within 5 squares of you.
Effect: The critical hit becomes a normal hit.
Special: You can use only one channel divinity power per encounter.
Published in Player's Handbook, page(s) 193, Class Compendium.