The mahāyoga-tantras of Pala Empire India became known in Tibet as 'Father Tantras' (pha rgyud). According to the Gelug view, following Tsongkhapa's reasoning, Father Tantras emphasize the creation of a Buddha form through the cultivation of an illusory body, on the basis of practices with the energy system of the subtle body. Earlier Sakya masters and Kagyu scholars had viewed Father Tantras as emphasising the practice of blissful awareness. Father Tantras have also been seen as emphasizing the use of anger (pratigha) as the path of practice, focusing on the emptiness aspect of Buddha nature.
