Bard Attack 3Cunning Ferocity

The mark of your weapon on your target’s hide gives strength to your allies’ attacks against the same foe.

Encounter        Arcane, Weapon
Standard Action      Melee weapon

Target: One creature

Attack: Charisma vs. Reflex

Hit: 1[W] + Charisma modifier damage, and each ally within 5 squares of you gains a +2 bonus to damage rolls against the target until the end of your next turn.

  Virtue of Cunning: The bonus to damage rolls equals 1 + your Intelligence modifier.

Published in Player's Handbook 2, page(s) 70.