Climactic Chord
Bard Utility 22
You call on the fighting spirit of your allies, compelling them to strike as one.
Close burst 10
Target: Each ally in burst
Effect: Each target can make a basic attack or use an at-will attack power as a free action, with a power bonus to the attack roll and the damage roll equal to your Charisma modifier.
Climactic Chord is a daily power available to bards at the 22nd level.[AP:15]