The Cakrasaṃvara commentators consider the tantra to be a timeless divine revelation of either the
Dharmakāya Buddha Mahāvajradhara or of the goddess
Vajravārāhī. The central deity of the tradition is called Samvara, Śamvara, Śrī Heruka
, or simply
Heruka. This figure became popular in Buddhist circles around the 8th century. The noun
samvara derives from a verb which means to "bind," "enclose," or "conceal," and
samvara commonly means "vow" and sometimes "sanctuary". In the tantra it appears in various compounds, such as "the binding of the dakini net" (
ḍākinījālasamvara), which is associated with the term "union with Śrī Heruka." In this sense,
samvara can also refer to "union", which is supreme bliss and supreme awakening. According to Gray, the "dakini net" is the Cakrasaṃvara mandala, dominated by the three wheels of the dakinis and their consorts. Furthermore, "its 'binding' is the process of union or mystical identification in which the adept engages via creative visualization, thereby achieving "union with Sri Heruka." This term thus refers to the "body mandala" practice in which the adept visualizes the three wheels of the mandala within his/her own body." Gray writes that the name of Samvara has an ancient lineage. A figure called Śamvara can be found in the
Rig Veda, as an enemy of
Indra and as a kind of
asura. Asko Parpola has argued that Samvara and other similar deities which are associated with the power of illusion (
maya) are remnants of pre-Aryan cults. Gray writes that there may have been an asura cult that the Buddhists drew from in their development of "new cults of deities who were viewed as manifesting hostility to the classical Hindu deities such as
Maheśvara and
Narayana, just as the asura were the perpetual foes of the older vedic deities such as Indra." In this, they may have also been influenced by
Puranic sources which portrayed the Buddhist "heresy" as a trick meant to deceive the asuras. Regarding the name Heruka, it first appears as a name for a class of fierce demon like beings. Heruka also appears as a charnel ground deity which is said to be "the guise assumed by the Buddha Vajradhara in his effort to subdue evil doers," in the
Samayoga Tantra. In the
Samayoga, the universe is being destroyed by evil beings (stirred up by Mara), and all the Hindu deities in the universe seek refuge in Supreme Buddha
Vajradhara, who assembles all the Buddhas. Since these evil beings are not able to be subdued by peaceful means, the Buddhas must manifest ferocious appearances. Heruka is born from Vajradhara Buddha's transcendent power and he burns up the entire universe, purifying it in the process. Gray writes that eventually this earlier myth of Heruka's origin evolved into a more polemical version, in which Heruka is born to subdue Shaiva deities, like
Rudra and
Mahabhairava, which are here seen as the source of the cosmic disorder. This was probably influenced by another myth in which Shiva is subdued by
Vajrapāṇi in the
Tattvasaṃgraha An Indian version of this myth can be found in Indrabhuti's commentary and is cited by Gray. In it, Vajrapāṇi forces Mahadeva, i.e. Shiva (along with a host of deities) to appear in
Akanishtha ( Highest Realm of Rūpadhātu lokas), whereupon he is annihilated when he refuses to turn from his evil ways. Then Vajrapāṇi revives Mahadeva with his mantric power, and
Shiva then becomes a Buddha in the Future, known as "Bhasmeśvara", included in
Kāraṇḍavyūha Sūtra. 47-48 Then the myth also tells of how Vajradhara Buddha created body known as Śrī Heruka in order to subdue Bhairava and Kalaratri who had taken over the world with their hateful and lustful ways. Heruka takes Bhairava's form and sends out various deities to subdue and destroy Bhairava and his associated deities. These Buddhist deities then take the form of the Bhairava deities as a skillful means (upaya). According to David Gray, This myth represents the adoption of non-Buddhist elements while at the same time representing the subordination of these elements within a Buddhist cosmic hierarchy, graphically represented by the placement of the Saiva deities under the feet of their Buddhist vanquisher. The myth provides an elaborate fourfold scheme for this process of the appropriation and subordination of a non-Buddhist tradition. Samvara is one of the principal
yidam or meditational deities of the
Sarma schools of
Tibetan Buddhism. Samvara is typically depicted with a blue-coloured body, four faces, and twelve arms, and embracing his consort, the wisdom
dakini Vajravārāhī (a.k.a.
Vajrayoginī) in
Yab-Yum (sexual union). Other forms of the deities are also known with varying numbers of limbs and features, such as a two armed version. According to the Buddhist Tantric scholar
Abhayakaragupta, the deity's mandala is described thus:In the Samvara mandala there is a variegated lotus atop
Mount Sumeru within an adamantine tent (
vajrapañjara). Placed on it is a double vajra, which sits as the base of a court in the middle of which is the Blessed Lord. He stands in the archer (
alidha) stance on
Bhairava and
Kalaratri who lie on a solar disk atop the pericarp of the lotus. He is black and has four faces which are, beginning with the front [and continuing around counter-clockwise], black, green, red, and yellow, each of which has three eyes. He has a tiger skin and has twelve arms. Two arms holding a
vajra and a vajra-bell embrace Vajravarahi. Two of his hands hold up over his back a white elephant hide dripping with blood. His other [right hands hold] a
damaru drum, an axe, a flaying knife (
kartri), and a trident. His remaining left [hands hold] a
khatvanga staff marked with a vajra, a skull-bowl filled with blood, a vajra noose, and the head of
Brahma. A
garland of fifty moist human heads hangs about his neck. He has the six insignia, and a sacred thread made of human sinew. He has a row of five skulls above his forehead, and a crest of black dreadlocks topped by a left-oriented crescent moon and a double vajra. He is endowed with a fierce meditative state (
vikrtadhyana) and bears his fangs. He brings together in one the nine dramatic sentiments (
navarasa). == Practices ==