Your foe will pay for the injury it causes another.

Encounter   ✦     Arcane, Weapon
Standard Action      Ranged weapon

Target: One creature

Attack: Charisma vs. AC

Hit: 2[W] + Charisma modifier damage. If the target hits with an attack before the end of your next turn, it takes 1[W] + your Wisdom modifier damage.

Published in Arcane Power, page(s) 22.