At your touch, your ally's armor gains unmatched strength, causing even the mightiest blow to bounce off it.

At-Will   ✦     Divine
Minor Action      Melee touch

Target: One ally

Effect: Until the end of your next turn, the target gains a +2 power bonus to AC, or a +4 power bonus if the target is wearing heavy armor.

Special: You can use this power only once per round.

Published in Player's Handbook 3, page(s) 114.