Enraging Strum

You play a discordant chord on your instrument, imbuing it with power. All creatures of your choice within a 30-foot sphere centred on you must succeed on a Charisma saving throw or take 2d4 psychic damage and become enraged. An enraged enemy considers everything around it hostile, and will target the creature closest to it whenever it makes an attack. It can repeat the saving throw at the end of each of its turns. 

On a successful save, the target takes half damage and is not enraged. A creature that is immune to charm effects is unaffected by this spell. 

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 2d4 for each slot level above 1st.