C'hantir

Choir of Twilight, Ghoul Song of the Starless Void: Sapient song that travels from person to person. Only a handful of notes have been heard, but when sung out loud or in their head can drive people to madness. The longer it is sang, the more complex it becomes, eventually becoming too much for the mortal body to bear and causing an entropic collapse of body and brain from eldritch sound.   Potent weapon against unnatural beings as it destabilizes not only their corporeal form, but harms their existence. Death can be avoided with dance, as it is thought to entertain C'hantir, though few have managed it.   Servants: Ululari, the Doomsingers - its offspring who take the form of sinister musicians who play the Lamentation of Twilight and can cause entire communities to sing to death. Those who dance to appease C'ahntir but do not have the skill are often changed into Ululari