Homebrew, Dungeon Dad
Innate Spellcasting. The bonesinger’s innate spellcasting ability is Charisma (spell save DC 14). It can innately cast the following spells, requiring no material components:
Danse Macabre. While a bonesinger plays its instrument of choice, it is constantly surrounded by a 30' aura of barely visible dancing spectral figures. Any living creature that enters the aura or starts its turn there must make a DC 14 Wisdom saving throw. On a failed save, the creature begins dancing with the ghostly figures and spends its action making a performance check. If it rolls a 15 or higher nothing else happens. On a roll of 14 or lower the target takes 18 (4d8) psychic damage. On a successful save nothing happens.
Multiattack. The bonesinger makes two shortsword attacks.
Shortsword. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 5 (1d6 + 2) piercing damage.
Bonesinger’s Curse. When a creature within 60' makes a saving throw the bonesinger reduces the result by 1d4.