Claim: The Dramyin Cham dance celebrates an incident in Tibetan Buddhist mythology - the victory of the saint Arahat Mahinda who subjugated a demon by performing a dramyin cham, and it offered its services to him and became the guardian deity of the valley.
Evidence: 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.