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Adversarial Song
Bard Attack 25

Your song erupts in your foe's mind, weakening its attacks against any creature but the ally you name. At the same time, it bolsters that ally so that he or she can fight the foe to the bitter end.

Ranged 10

Target: One creature

Attack: Charisma vs. Will

Hit: 3d10 + Charisma modifier psychic damage.

Miss: Half damage.

Effect: Choose an ally within 10 squares of you. The target deals half damage to any of your allies except the chosen ally (save ends). In addition, that ally deals 1d10 extra damage on a hit against the target until the end of the encounter.

Adversarial Song is a daily power available to bards at the 25th level.[PH2:76]