Acheron Flurry

 
Prerequisite(s): Improved Unarmed Strike, Knowledge (the Planes 4+ ranks, Dex 15+, Wis 15+
 
Benefit: During your turn, designate an opponent within reach to whom you have dealt damage during this encounter using an unarmed strike. You can spend a standard action to confound and distract your chosen foe with a constant fl ood of distracting mock attacks. While doing this leaves you open to attacks (applying a -2 penalty to your Armor Class), your foe may take only a single standard action or move action on his next turn. If you move away (or are otherwise no longer conscious and adjacent to your foe) before your chosen foe's next turn, he may act normally.
 
Source:Planar Handbook