Gyüluk Phurba (Tib. རྒྱུད་ལུགས་ཕུར་པ་, Wyl. rgyud lugs phur pa) or Tantra System Vajrakilaya — a Vajrakilaya practice that arose in the wisdom mind of Jikme Lingpa, but which is at the same time extracted from the tantras. For this reason it is considered both a treasure revelation or terma and part of the oral transmission of the words of the Buddha or kama. When Jikme Lingpa was staying in retreat at Paro Taktsang, he had a vision of one of the twenty-five disciples of Guru Rinpoche, Palgyi Senge, who explained how to arrange the practice.
He had completed the collection by 1783, when he gave the transmission for it at Sakya monastery.
Jikme Lingpa himself wrote texts on how to perform a drupchen, and later additions were made by the third Dodrupchen Jikme Tenpe Nyima and the fourth Dodrupchen Tubten Trinlé Pal Zang. The fourth Dodrupchen Rinpoche established a drupchen practice at Chorten Monastery, held once every three years.