"And for a full three days they danced the dance of the waning sun, and their laughs turned to wails and smiles became grimaces." - The Tolluven (Book of Dark Curses)
It takes only one to begin the dance for an entire town to soon become infected. The Dance of the Waning Sun is a vile curse that masquerades as a something joyful. The first to be cursed will begin to hear music in their heads within a day of the curse taking effect. The music is cheerful and it's almost impossible not to move your body to the sound.
Within two days the cursed dancer will be dancing in the streets and those that look upon them will themselves begin to hear the music and dance. After three days an entire town could be dancing this joyful jig without a care in the world.
As the sun sets on the third day the dancers begin to decay. Their limbs break away and the cheer is replaced by anguished screams and bloody gurgles until a only a black mass is left on the ground.
The curse can be lifted by dousing the dancer thrice in water blessed by a priest before breaking a harp in front of the dancer. However, the person lifting the curse must take precautions against becoming a dancer themselves by blindfolding themselves and plugging their ears. Alternatively, killing the cursed dancer will also get rid of the curse (for obvious reasons).
Placing the Dance of the Waning Sun curse requires three ingredients: the beak of a diseased crow, a cup of mortal blood and a song.
The song lyrics go as such:
When the sun swells on the horizon
and the night reveals the moon
bring music to this mortal flesh
and dance until its doom
The beak should be ground into a dust and added to the blood. This song must be sung to the blood cup so that it absorbs the words and melody. Then the curse must be directed at a specific person by thought. A full name must be known for the curse to work and it will only work if that person is within a mile of the ritual.