When your enemy shrugs off an ill effect, you call spirits from the remnants of that effect to distract a different foe.

Daily   ✦     Primal
Free Action      Close burst 10

Trigger: An enemy you can see saves against an effect that a save can end

Target: One enemy in the burst other than the triggering enemy

Effect: Whenever the target attacks you before the end of the encounter, the target grants combat advantage until the end of its next turn.

Published in Player's Handbook 3, page(s) 120.