Narak Kong Shak
Narak Kong Shak is a famous practice of confession and fulfilment associated with the Narak Dongtruk ('Emptying the Lower Realms from their Very Depths') tantra, and compiled from the Kagyé Sangwa Yongdzok, which is a revelation of Guru Chökyi Wangchuk, and the Kagyé Drakpo Rangjung Rangshar of the Northern Treasures.
It is known as one of the most powerful and important methods or practices of confession, and is also a particularly powerful prayer for those who have died or are ill.