While attacking your foe, you take careful stock of its fighting stance, so when the foe makes its next move, you foil it.

Encounter   ✦     Augmentable, Psionic, Weapon
Standard Action      Melee weapon

Target: One creature

Attack: Constitution vs. AC

Hit: 1[W] + Constitution modifier damage. Until the end of your next turn, the target provokes opportunity attacks from you whenever it shifts

Augment 2

Hit: 2[W] + Constitution modifier damage. Until the end of your next turn, the target provokes opportunity attacks from you and your allies whenever it shifts or makes close attacks.

Published in Player's Handbook 3, page(s) 58.