You can always spot easy prey.

Encounter   ✦     Martial
Minor Action      Personal

Prerequisite: You must be trained in Insight.

Effect: Until the beginning of your next turn, you gain combat advantage against one target within line of sight. If the target is taking the attack penalty from one of your rattling attacks, you instead gain combat advantage until the end of your next turn.

Published in Martial Power, page(s) 77.