You home in on your foe, linking your weapon to its life force to improve your accuracy.

Encounter   ✦     Augmentable, Psionic
Minor Action      Close burst 10

Target: The enemy nearest to you in the burst

Effect: Until the end of the encounter, you gain a +2 bonus to opportunity attack rolls against the target, and it grants combat advantage to you while you're the only creature adjacent to it.

Augment 1

Special: If the target drops to 0 hit points during this encounter, you regain the use of this power.

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