The dramatic practice of ch d, in which the yogin visualizes giving his or her own sacrificed body to the gods and demons as a way to cut the attachment to self and ordinary reality, offers an intense and direct confrontation with the central issues of the spiritual path. The ch d practices of the B n tradition, a tradition that claims pre-Buddhist origins in the mysterious western lands of Zhang-zhung Tazig and Olmolungrig, are still almost entirely unknown.