The great Indian scholar and Tantric Buddhist Master (Mahasiddha), (AD 1016-1100), who emphasised the practices of Heruka and Vajrayogini. The lineage of Vajrayogini instructions called the ‘Narokhacho lineage’ was transmitted directly from Buddha Vajrayogini to Naropa. From him, these instructions have passed through an unbroken lineage of realized practitioners to the present-day.