Avenger Feature Divine Guidance
You lend your deity’s guidance to an ally’s attack against your foe.
Immediate Interrupt Close burst 10
Channel Divinity: You can use only one channel divinity power per encounter
Trigger: An ally within 10 squares of you makes an attack roll against your oath of enmity target
Target: The triggering ally
Effect: The target makes a second attack roll and uses either result.
Published in Player's Handbook 2, page(s) 34.