A culling song is a powerful piece of gnostic magic within the Bardic school of Tuning. Tribes of Littlefolk practice it to perform euthanasia on the old and wounded, or to kill infants when there is a time of famine. The song directly removes a knot from the person who is the focus of the song, killing them painlessly and moving through soul directly on to the loom.
Theoretically, a culling song could kill anyone it is focused upon, though its use as an offensive weapon are minimal due to the time and concentration needed to perform it. A culling song usually takes the expertise of a bard, accompanied by other singers and musicians, several minutes to perform on the subject.