Runepriest Utility 6Banner of Alliance
You invoke the rune of shared pains, allowing you to absorb the punishment meant for an ally.
Minor Action Close burst 5
Target: One ally in the burst
Effect: Until the end of the encounter, whenever the target takes damage, you can use an immediate interrupt to take the damage in the target’s place.
Published in Player's Handbook 3, page(s) 104.