The Cakrasaṃvara Tantra or Khorlo Déchok is considered to be of the mother class of the Anuttarayoga Tantra in Vajrayana Buddhism. It is also called the Discourse of Sri Heruka (sriherukabhidhana) and the Samvara Light (Laghusamvara). David B. Gray dates this tantra to the late eight or early ninth century.
Apart from classical Mahāyāna Buddhist practices like the six perfections, Tibetan Buddhism also includes tantric practices, such as deity yoga and the Six Dharmas of Naropa as well as methods which are seen as transcending tantra, like Dzogchen.
In Tibetan Buddhism, practices are generally classified as either Sutra (or Pāramitāyāna) or Tantra (Vajrayāna or Mantrayāna), though exactly what constitutes each category and what is included and excluded in each is a matter of debate and .
The Buddhist Tantras are a varied group of Indian and Tibetan texts which outline unique views and practices of the Buddhist tantra religious systems.
Buddhist Tantric texts began appearing in the Gupta Empire period though there are texts with elements associated with Tantra that can be seen as early as the third century.
By the eighth century, Tantra was a dominant force in North India and the number of texts increased with numerous Tantric pandits writing .