Crusader's Strike p. 58
Divine energy surrounds your weapon as you strike. This power washes over you as your weapon finds its mark, mending your wounds and giving you the strength to fight on.
As part of initiating this strike, you must make a successful melee attack against an enemy whose alignment has at least one component different from yours. This foe must pose a threat to you or your allies in some direct, immediate way. If your attack hits, you or an ally within 10 feet of you heals 1d6 points of damage + 1 point per initiator level (maximum +5).