Step Up and Strike (Feat)
When a foe tries to move away, you can follow and make an attack.
Prerequisites: Level 16, Following Step (Feat), Step Up (Feat)
Benefit: When using the Step Up (Feat) or Following Step (Feat) feats to follow an adjacent foe, you may also make a single melee attack against that foe at your highest base attack bonus. This attack counts as one of your attacks of opportunity for the round. Using this feat does not count toward the number of actions you can usually take each round.
Normal: An opponent making a 5-foot step does not provoke attacks of opportunity.