Reveler's Concertina

While holding this concertina, you gain a +2 bonus to the saving throw DC of your bard spells.

As an action, you can use the concertina to cast Otto's irresistible dance from the item. This property of the concertina can't be used again until the next dawn.

If you have proficiency with a given musical instrument, you can add your proficiency bonus to any ability checks you make to play music with the instrument. A bard can use a musical instrument as a spellcasting focus, substituting it for any material component that does not list a cost. Each type of musical instrument requires a separate proficiency. Proficiency with a musical instrument indicates you are familiar with the techniques used to play it. You also have knowledge of some songs commonly performed with that instrument.

History: Your expertise aids you in recalling lore related to your instrument.

Performance: Your ability to put on a good show is improved when you incorporate an instrument into your act.

Compose a Tune: As part of a long rest, you can compose a new tune and lyrics for your instrument. You might use this ability to impress a noble or spread scandalous rumors with a catchy tune.

Musical Instrument: