Bard Attack 1Arrow of Warning
Your shot hinders an enemy and gives its would-be target the perfect opportunity.
Daily Arcane, Weapon
Immediate Interrupt Ranged weapon
Trigger: An enemy within range makes an attack roll against an ally
Target: The triggering enemy
Attack: Charisma vs. Reflex
Hit: 3[W] + Charisma modifier damage. The ally who was attacked by the triggering enemy can make an at-will attack against that enemy as a free action. The ally gains a bonus to this attack roll equal to your Wisdom modifier (minimum 1).
Miss: Half damage.
Published in Arcane Power, page(s) 7.