You enforce balance with a flare of divine energy that lances your enemy.

Encounter ✦     Divine, Radiant
Immediate Reaction      Ranged 10

Channel Divinity: You can use only one channel divinity power per encounter

Trigger: An enemy reduces your ally to 0 hit points or fewer or damages your unconscious ally

Target: The triggering enemy

Effect: The target takes radiant damage equal to 5 + one-half your level.

Published in Divine Power, page(s) 114.