The short biography of Dark Virūpa: Disciple of Senior Virūpa as told by Tāranātha
Dark Virūpa [Junior Virūpa] of Odiyana is the disciple of Yogeshwara [Senior] Virūpa. He was born in the family of a Brahmin. When he was born, astrologers predicted that he would commit four sins. Thus he was named the dark one [Krishna/kanha]. When he was about seven years old, he was sent away from home on a journey to avert the four sins. Many years later, when the husband and in-laws of his mother, the Brahmin lady Lakshmi, died, she too had to leave her hometown and travel to other places. At a place called Odivisha in the East, while she was selling wine, her son (Dark Virūpa) also arrived there. He entered his mother's tavern. Since the mother and son didn't recognise each other, they slept together that night. He got thirsty and reached for the earthen pot to drink water, but it was alcohol. In anger he threw the pot. It hit a cow and the cow died. At night a jackal from the roof dropped a pitchfork and it hit the head of a Brahmin who was passing by and the Brahmin died. He became suspicious. After talking to other people, he found out that the woman he had slept with last night was his mother. All four of the sinful deeds that the astrologer had foretold happened on the same night. He went everywhere to find a way to cleanse his sins, but no one believed his story.
Then he met Mahāsiddha Jālandhara. Mahāsiddha Jālandhara gave him the teaching of Vajravarahi. He told him that this would wash away his sins. Later, in the Konkan region, he remained submerged in water below the throat for six months doing sadhana. There was no sign of any siddhis. He broke his string of beads and threw them into the water in agner. He went back to his teacher Jālandhara to seek guidance. Jālandhara said, "Do some more sadhana, you will very soon attain siddhi." He continued his practice as before. Seven days later, at dawn, Vajrayogini appeared in the form of a woman. Vajrayogini said, 'Have you come here to Konkan to die? Dark Virūpa brought his palms together above his head and said, 'Mother Vajrayogini, I take refuge in you' (अयि माता वज्रयोगिनी तेरी शरण/Ayi Mātā Vajrayoginī Terī Śaraṇa). At that moment Dark Virūpa attained the highest samadhi. Vajrayogini said, 'The person with whom you have had a strong karmic relationship for many lifetimes is the Mahāsiddha Virūpa. He is now in Maharashtra. Go and see him.”
Note:
Some Sakya masters such as Ngor Khenchen Kunga Zangpo (14th-15th century) claim that the source of the teachings of Amrtasiddhi and Chinnamastā Devi is the junior Virūpa, not the senior Virūpa.
This story of Dark Virupa is taken from Taranatha’ Tibetan text བཀའ་བབས་བདུན་ལྡན་གྱི་བརྒྱུད་པའི་རྣམ་ཐར་ངོ་མཚར་རྨད་དུ་བྱུང་བ་རིན་པོ་ཆེའི་འབྱུང་ཁུངས་ལྟ་བུའི་གཏམ་ཞེས་བྱ་བ་ Biographies of the Masters of the 7 Transmission Lineages of Buddhist Tantras by the Mahasiddhas of India. Dark Virupa’s story was told in the Tummo transmission lineage came down from senior Virupa.