The Tier 3Paladin Armor Set Redemption Armor includes a 6-piece set bonus that has a chance to imbue the healed target with Holy Power, a temporary effect that buffs the player according to their class:
Increases the friendly target's armor by 700 for 8 sec.
Warrior, ???
Increases the friendly target's attack power by 140 for 8 sec.
Hunter, Rogue, ???
Increases the friendly target's spell damage and healing by up to 80 for 8 sec.
Paladin, Mage, Warlock, Priest, ???
Increases the friendly target's mana regeneration by 28 per 5 sec. for 8 sec.