Defensive Rebuke

You sweep your weapon in a wide, deadly arc. When
your blows strike home, you send your foe tumbling
back on the defensive. He must deal with you first,
or leave himself open to your deadly counter.
Each enemy you strike for 1 round after you
initiate this maneuver becomes vulnerable to
your further attacks. If such an opponent
attacks anyone other than you in melee for the
duration of the maneuver, that attack provokes
an attack of opportunity from you.