Your autoattacks have a 20% chance of resetting the cooldown of your Exorcism.
The Art of War is a passive paladin ability learned at level 50 for those with the Retribution specialization. It grants autoattacks a chance to reset the cooldown of [Exorcism].
Patch 3.2.0 (04-Aug-2009): Now only applies to melee critical hits, but will make your next Flash of Light or Exorcism instant. In addition, this talent now provides notification in the floating combat text when it activates.