Allied Rhythm
Bard Utility 16
The greatest heroes always had a little help from their friends.
Ranged 10
Target: You or an ally
Effect: Until the end of your next turn, the target gains a power bonus to each of his or her attack rolls equal to the number of allies adjacent to the target of each of those attacks.
Allied Rhythm is an encounter power available to bards at the 16th level.[AP:13]