Brown Note

You produce a note from your music instrument that resonates with a specific kind of creature you choose (Aberations, Beasts, Celestial, Construct, Dragon, Elemental, Fey, Fiend, Giant, Humanoid, Monstrosity, Ooze, Plant or Undead).

All creature of the chosen type within 90 ft. of you must make a CON save, on a failure, they are considered charmed, their Charisma score is halved, they get disadvantage on all Charisma based ability checks, Charisma saving throws and spell attacks made by Charisma based spellcaster. On a successful save, they are completely unaffected.

While you are concentrating on this spell, your speed becomes 0 ft. and you cannot cast spells of 6th level or higher.

A creature immune to being charmed or that cannot hear you automatically succeeds it's saving throw.