It was from Paro Pangbisa that Terton Sherub Mebar who was foretold to visit a lake called Nub-Tshona-Patra went with a team of carpenters on the mission to fetch the golden pillar for Paro Rinpung Dzong from the lake.
With his supernatural power, he held the water of the lake in his mouth to allow the carpenters to cut the pillars from the bottom of the lake.
Carpenters were given the exact measurement of the pillar to be cut and also instructed to take the gold splinters that came out after chopping.
But carpenters grew greedy seeing the huge amount of gold and they started defying the order of the Terton.
Terton shook his head and murmured when carpenters went beyond the given margin but then lake busted out his mouth killing all the carpenters.
The Tshodag(female lake spirit) then chased Terton.
To appease the furious water(Tshodag) he dropped the treasures collected from the lake one by one.
Each time he dropped a treasure a small lake was formed. The lakes formed after dropping the Nga(drum) were known as Ngatsho(drum lake), Ngyeto as Ngyetosho(drumstick lake), and Dung as Dungtsho(trumpet lake) and one cymbal as Relgo or Relkotsho.
Ap Chungdu, the local deity mediated between the female spirit(Tshodag) of the lake and the Terton Sherub Mebar. To resolve the conflict between the two, Ap Chundu demarcated a boundary near Zoutsho(Sickle lake) by building five cairns as Do-Tsam.
Terton Sherab Mebar and his descendants were not allowed to cross the Dotsam on the other side n Tshodag on this side.
Finally, Terton was left with a single cymbal which is there in Paro Dzong and has been displayed on the first day of Paro Tshechu.
1)Pillar might not be for Paro Rinpung Dzong because initially the five-storied Dzong was built in the 15th century and later by Zhabdrung in the 17th century.
And It’s said that Terton came to Bhutan in the 13th century.
2)Some mentioned that the place demarcated by Ap Chundu was Tegola.
But the place which many locals mentioned with five cairns near Zoutsho could be more accurate as it’s near to Nyetotsho, Nyatsho, and Relgotsho.
2)Nub-Tshona-Patra and Nub-Lang, the bull from west or Nubtshonpatra.
The story goes something like this: A herder from Nakha, was herding cattle in Pang Gongma somewhere near the present site where Nub Tshona Patra is today. When it became dark, a couple appeared and asked if he would let them rest at his place for the night.
The herder treated them to a sumptuous feast of dairy produce. When they left the next morning, the couple told the herder that they would send a bull as a token of gratitude for his generous hospitality.
Two days later, a lean red bull slowly walked towards his herd.
The cattle in the shed retreated and gave way to the bull, submitting to its supremacy. Since then, the herder’s cattle bred to the extent that he found it difficult to manage.
Another source said that the bull was shot with an arrow, as the herder was unable to manage the expanding herd. The bull rushed off, leaving behind the herd, and entered a nearby lake. The lake today appears red, which is believed to be the blood of the bull.
The locals believe that the Nublang was the gift of local guardians of legendary Nubtshonaptra.