The loving tie between you and your friend allows you to take some of the pain he or she would have suffered alone.

Encounter ✦     Divine
Immediate Interrupt      Ranged 5

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

Trigger: An ally within 5 squares of you takes damage

Target: The triggering ally

Effect: The damage against the target is reduced by 5, and you take 5 damage, which can't be reduced in any way.
Level 11: The damage is reduced by 10, and you take 10.
Level 21: The damage is reduced by 15, and you take 15.

Published in Divine Power, page(s) 115.