Chant of Devastation
Bard Attack 25
You chant a song that drives your allies to strike, and strike hard.
Personal
Effect: Until the end of the encounter, your skald's aura gains the following effect: Once per round when you or an ally in the aura hits an enemy with an attack, that enemy takes ongoing 15 damage (save ends).
Chant of Devastation is a daily power available to bards at the 25th level.[HotF:67]