“An incarnation called Labkyi Dronma will
practice in the district of Zangs-ri and cut through all negative thoughts,
uprooting them completely. She will cut discursiveness off so finely that
negative thoughts will be without roots and will never arise again.”
- From a prophesy of Padmasambhava concerning Machik Labdron.
The Chöd damaru is a large double-sided hand held drum. 'Chöd' literally means 'cutting' or 'destroying'. The practice of Chöd involves a powerful combination of puja and meditation, where the practitioner offers their own body to cut away the four demons within. Machik Labdron received the Chöd teachings from her Indian guru, Padampa Sangye and also from Kyoton Sonam Lama and propagated them in Tibet.
"Chöd means cutting through, i.e., severing erroneous concepts about the world of appearances and all illusions regarding the existence of a personal self. The practice of Chöd is an advanced skilful method that enables practitioners to become free of clinging to false notions and beliefs regarding inherent existence of appearances and experiences and therefore of an individual self. Attachment and clinging to a self are forces that give rise to the defilements, which are the source of anguish and pain. Chöd is the practice that enables disciples to understand emptiness of all appearances that are fit to arise and therefore can be apprehended. It is an exceptional practice"
~ Venerable Thrangu Rinpoche ~
Further information on the practice of Chödcanbe viewed here.