A vindicator can channel energy into his shield as a standard action; when worn, the shield gives the vindicator a sacred bonus (if positive energy) or profane bonus (if negative energy) to his Armor Class equal to the number of dice of the vindicator's channel energy. This bonus lasts for 24 hours or until the vindicator is struck in combat, whichever comes first. The shield does not provide this bonus to any other wielder, but the vindicator does not need to be holding the shield for it to retain this power.