Nothing happens immediately when you initiate this maneuver. Just before the beginning of your next turn, you may make a single melee attack against each enemy in reach that has not attempted to attack you (using the definition used by Invisibility) since you initiated this maneuver. If an enemy attempts to move out of your reach, you may make the melee attack then (in addition to the attack of opportunity you might be allowed). For each enemy that has attacked you or tried to run away between when you initiate the maneuver and making the attack, you get +1 to hit on these attacks. For every five points of damage those attacks have dealt to you (before damage reduction), your attacks do +1 damage.