This paper will present an overview and analysis of ’Jig rten mgon po’s (1143–1217) explanation of luminosity (prabhāsvaratā;’od gsal ba) from his Mahāmudrā perspective in terms of basis, path, and fruit. This is most clearly outlined in his ’Od gsal rnam lnga gcig tu bsre ba’i man ngag, a pith instruction on merging (bsre ba), a genre of Bka’ brgyud teachings generally associated with the nā ro chos drug tradition. While chos drug instructions on luminosity tend to focus on deep sleep tantric practices, this text outlines luminosity in terms of mind’s true nature, which is to be pointed out, […]