Emerald's Song of Anger

You sing a magical ballad that enrages a target that you can see within 15 feet. At the end of its next turn, it gains it gains temporary Hit Points equal to 1/3 of the damage it dealt that turn, rounded down. When Cast in a spell slot of 5th level or higher, the target adds 1d10 to one damage roll made on its turn. Targets that cannot hear are unaffected.

No lights! No music! Just anger!