# Reveler's Concertina *Wondrous item, instrument, rare (requires attunement by a bard)* 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](/Rules/Source/spells/ottos-irresistible-dance-xphb.md) from the item. This property of the concertina can't be used again until the next dawn. *Source: Tasha's Cauldron of Everything p. 134*