20. Vimalmitra (tib.dri med bshes gnyen).
A master in the Dzogchen lineage and the crown ornament of five hundred panditas, who had attained the indestructible form of the rainbow body. He received the transmission of Dzogchen from Shri Singha and Jnanasutra. Vimalamitra is regarded as one of the three main forefathers for establishing the Dzogchen teachings, especially the Instruction Section, in Tibet, which he chiefly transmitted to five people: King Trisong Deutsen, Prince Muney Tsenpo, Tingdzin Sangpo of Nyang, Kawa Paltsek and Chokro Lui Gyaltsen.
Having translated these extremely profound instructions, he concealed the texts at Samye Chimphu for the sake of future generations. On his departure to the Five-peaked Mountain in China, Vimalamitra made the promise to return once every century in order to clarify and propagate the teachings of the secret, innermost essence, Sangwa Nyingthik. The oral lineage of his teachings on the Instruction Section was continued by Tingdzin Sangpo of Nyang who also concealed one set of the scriptures.
One hundred and fifty five years after Vimalamitra departed from Tibet, an emanation of him named Dangma Lhüngyal took out the hidden texts. They are now included in the collection known as Vima Nyingtik, the Heart Essence of Vimalamitra.
In his role as lineage holder of Nectar Quality among the Eight Sadhana Teachings, he is counted among the Eight Vidyadharas of India, the receiver of the Eightfold Volume of Nectar Quality. According to this lineage he was born in Elephant Grove, an area in the western part of India. He was learned in both the common and extraordinary topics of knowledge and received teachings on the tantras from Buddhaguhya and many other illustrious masters. Having practiced, he reached the accomplishment of the vidyadhara level of Mahamudra and wrote numerous treatises, mainly on the teachings connected to the Magical Net.
21. King Trisong Detsun, (khri srong de'u btsan). (790-844 ce)
Trisong Deutsen The second great Dharma king of Tibet who invited Guru Rinpoche, Shantarakshita, Vimalamitra, and many other Buddhist teachers including Jinamitra and Danashila.
In The Precious Garland of Lapis Lazuli, Jamgon Kongtrul dates Trisong Deutsen as being born on the eighth day of the third month of spring in the year of the Male Water Horse (802). Other sources state that year as his enthronement upon the death of his father. Until the age of seventeen he was chiefly engaged in ruling the kingdom. He built Samye, the great monastery and teaching center modeled after Odantapuri, established Buddhism as the state religion of Tibet, and during his reign the first monks were ordained. He arranged for panditas and lotsawas to translate innumerable sacred texts, and he established a large number of centers for teaching and practice.
Among his later incarnations are Nyang Ral Nyima Özer (1124-1192), Guru Chowang (1212-1270), Jigmey Lingpa (1729-1798), and Jamyang Khyentse Wangpo (1820-1892).