Wondrous Item, Rare (requires attunement; cost 1500 gp)
A fey-crafted guitar
This guitar is brilliantly painted with triangles of bright color. While attuned, you gain an expertise die on Performance checks made with this guitar. Additionally, once per day, you may use an action to cast bestow curse as a 5th-level spell, without spending a spell slot. However, the curse is always disadvantage on Dexterity ability checks and saving throws and each failure is followed by a slapstick sound effect.