Shardza Tashi Gyaltsen (1859 - 1933 or 1935) was a great Dzogchen

Dzogchen

According to Tibetan Buddhism and Bön, Dzogchen is the natural, primordial state or natural condition of the mind, and a body of teachings and meditation practices aimed at realizing that condition. Dzogchen, or "Great Perfection", is a central teaching of the Nyingma school also practiced by...

 master of the Tibetan Bon tradition who not only took Bon disciples but gathered disciples from all traditions of Tibetan Buddhism

Tibetan Buddhism

Tibetan Buddhism is the body of Buddhist religious doctrine and institutions characteristic of Tibet and certain regions of the Himalayas, including northern Nepal, Bhutan, and India . It is the state religion of Bhutan...

. According to tradition, he famously realized the rainbow body

Rainbow body

In Tibetan Buddhism and Bön, a rainbow body is a body made, not of flesh, but of pure light.-In Dzogchen:...

.

Chaoul (2006) opened the discourse of Bon traditions of Trul khor

Trul khor

Tsa lung Trul khor known for brevity as Trul khor is a Himalayan tantric discipline which includes breathwork , meditative contemplation and precise dynamic movements to centre the practitioner and to...

 into Western scholarship in English with his thesis from Rice University

Rice University

William Marsh Rice University, commonly referred to as Rice University or Rice, is a private research university located on a heavily wooded campus in Houston, Texas, United States...

 which makes reference to writings of Shardza Tashi Gyaltsen, particularly byang zab nam mkha' mdzod chen las snyan rgyud rtsa rlung 'phrul 'khor (Wylie).

Literary works

• 'The Self-Dawning of the Three Bodies'
• byang zab nam mkha' mdzod chen las snyan rgyud rtsa rlung 'phrul 'khor (a Commentary on Trul Khor
  Trul khor
  Tsa lung Trul khor known for brevity as Trul khor is a Himalayan tantric discipline which includes breathwork , meditative contemplation and precise dynamic movements to centre the practitioner and to...
  
  )