The Most Metal Concert Ever

As an aid to your party members, you perform the Most Metal Concert Ever. Using your electric guitar, you emit enchanting heavy bass music that can be heard within 300 ft. Every enemy creature within this range is drawn to the music, and must make a DC 17 saving throw or be incapacitated, granting your party members advantage on their attacks on the enemy creatures. The enemy creatures may repeat the saving throw on each of their turns.