Deadly Dirge

 All enemies within 120 feet take 5 damage each round the bard continues to play Deadly Dirge and take no other actions. If the bard can continue this song for 8 consecutive turns, they can play a final chord that deals a blast of 100 thunder damage. This effect ends if the bard fails a concentration check, becomes stunned, silenced, knocked prone, unconscious, paralyzed, or grappled. The bard's movement is at half speed while playing, and they can't take move actions such as jump.