The Dramyin Cham dance celebrates an incident in Tibetan Buddhist mythology - the victory of the saint Tsangpa Gyare who subjugated a demon by performing a dramyin cham, and it offered its services to him and became the guardian deity of the valley.
Dramyin Cham (Dzongkha: Dramnyen Cham) is a form of Cham dance, a masked and costumed dance performed in Tibetan Buddhism ceremonies in Bhutan, Sikkim, Himalayan West Bengal and Tibet (where they have been outlawed). Specifically, the dance celebrates an incident in Tibetan Buddhist mythology - the victory of the saint Tsangpa Gyare (1161-1211) over a demon which was obstructing a pilgrimage path to Tsari, Tibet at the mouth of a valley. The saint apparently subjugated the demon by performing a dramyin cham and it offered its services to him and became the guardian deity of the valley. 
