Experiential Transmission of Dru Gyalwa Yungdrung: The Ancillary Instruction of the Boundless View Part 3 - Introducing Natural through Sounds, Rays, and Light The Dru Gyalwai Chag Tri is the collection of the text composed by Dru Gyalwa Yungdrung, the great 13th century master who lived from 1242-1290. Dru Gyalwa Yungdrung is the 57th lineage...