It is said that during his childhood games, Lhanangpa was the one to decide who would play elephant and who would play horse, who would play the minister of exterior, the minister of interior and the general. The other children could not play as they wished, but had to ask his permission first. He made up the rules of the games, and anyone who violated them would no longer be welcomed as his playmate. Clearly, this story is meant to display his born leadership abilities, but it equally conveys the sense of entitlement that often comes with privileged birth.
As a teenager, he felt a burning desire to follow the example of his illustrious ancestor and become a translator. Knowing that India was a very hot country, he performed yogic exercises that could help to withstand the heat. He thought that if he were to die, it would have to be in India. While he was still planning his India trip, at age nineteen, he met Jigten Gonpo ('jig rten mgon po) and immediately perceived him to be nothing less than a real Buddha. Jigten Gonpo ordered him to go to another place to receive complete monk ordination, which he did in 1190. On his arrival at Drigung ('bri gung), he spent seven years in solitary meditation inside a sealed hut. Then he went to Tsari, which was only at that time opening up as a place for meditation, for five more years of retreat. Tsari is a wild place of outstanding natural beauty located near the border of Assam. He spent many more years in still other secluded retreat places, included Mount Kailash, where he earned his title Lhanangpa (lha nang pa) late in his life after the name of a place where he meditated. He would never succeed in reaching India, although he did eventually visit Nepal.
His father, as his dying wish, requested that the skull-cup that had once belonged to Naropa, passed on in the family for generations and its most treasured possession, should be presented to Jigten Gonpo. Soon afterward, both of Lhanangpa's half brothers died, as did a number of other important members of his clan. Much of the family wealth was then donated to Drigung Til and Pagmodru.
Lhanangpa was most famous during his times for his lavish brown sugar feasts (bur ston chen po), which became proverbial for their generosity. Although these were religious gatherings, and the offerings included much more than sugar, in those times cane sugar of the dark brown kind known as jaggery was a highly valued luxury item which had to be imported all the way from India. At the largest and latest of his sugar feasts, held soon after Jigten Gonpo's death in 1217, 55,525 followers of the Drigungpa were in attendance. Quite late in his life, in about 1219, he founded a monastery named Lhatel Rinchen Ling (lha thel rin chen gling) where his disciples gathered to hear his teachings. His most famous miracle occurred at Lake Mapam (mtsho ma pham), where he went to visit the under-water palace of the naga king, and then surfaced in the center of the lake sitting cross-legged. This miracle was seen not only by his followers, but by all the nomads encamped around the lake as well.
He was said to have arrived Bhutan in 1194, where he established Chelkha Monastery which later known as Chelkha dzong and stayed for 11 years according to some histories. His followers and his minor drkung subject known as Lhapa remained stronghold for long time until it lost to the Drukpa Kaguye and formed number of dzongs which i suppose are those dzongs of Dongoen dzong, Jathel dzonn etc.
After having returned back to tibet, late some year before his death, he he returned back to Lhokha Zhi (lho kha bzhi) in search of the place where Sumthrang Lhakhang is found following the prophecy of his Great Master Drikung Jigten Sumgoen.He travelled via Monlakarchung mountain into Bumthang and reached the location passing through Choekhor toe and Tang valley.
Establishment of this monastery sowed the seed of Nyo linage in Bhutan where many elite personals such as the linage of Pemalingpa originated.
Note: The biography from 'the tresury of lives' is improved at the last three paragraphs