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Strings of Fate
Bard Attack 17

As you make an appeal to the fates of battle, your arrows streak toward your enemies, bypassing their armor to bind their doom.

Ranged weapon

Target: One, two, or three creatures

Attack: Charisma vs. Reflex

Hit: 1[W] + Charisma modifier damage. Until the end of your next turn, attacks against the target's AC instead target its Reflex.

Strings of Fate is an encounter power available to bards at the 17th level.[AP:14]