The Cakrasa?vara Tantra, Chinese: 衊?? sh?ngl? j?ng?ng; Tibetan: Korlo Demchog Gyud (Tibetan: ?????????????? / ????????; Wylie: Khor lo sdom pa / bde mchog gi rgyud) is considered to be of the mother class of the Anuttara Yoga Tantra in the Indo-Tibetan Vajrayana Buddhist tradition. The central deity of the mandala, a heruka known as Sa?vara (variants: Sa?vara & Sa?bara) or simply as ?r? Heruka, is one of the principal i??ha-devat?, or meditational deities of the Sarma schools of Tibetan Buddhism. Sa?vara is typically depicted with a blue-coloured body, four faces, and twelve arms, and embracing his consort Vajravarahi (in Chinese ?ヨダ j?ng?ng h?im?) in the yab-yum position. Other forms of the deity are also known, with varying numbers of limbs. Sa?vara and consort are not to be thought of as two different entities, as an ordinary husband and wife are two different people; in reality, their divine embrace is a metaphor for the union of great bliss and emptiness, which are one and the same essence.