In order to destroy those who in the degenerate age cause harm to many sentient beings by placing offerings at the twenty-four sacred places of the great non-Buddhist gods, the Buddha, the Blessed One, Śākyamuni, arose in the form of the Victor Vajradhara and emanated as the glorious Cakrasaṃvara and taught the Cakrasaṃvara Root Tantra. Then, it was propagated widely by the great adept Saraha, the protector Nāgārjuna, and others. The great adept Lūipa composed the texts of the two stages of sādhanas of the sixty two deities of Cakrasaṃvara, which are now called the Lūipa System. His disciple Vajraghantapa received it from Darikapa. The texts of the five deities of the outer mandala and the sixty two deities of the body mandala, and other related texts are the Ghaṇṭāpāda System. Vajraghantapa passed this tantra to Krsnacarya from Ruiba Shab (Tortoise Foot). The texts and instructions of these three - Lu, Nak, and Dril - gradually spread throughout the snowy land of Tibet. This deity is the guru of all Mother Series of tantras; it is the unsurpassable wisdom tantra that emphasizes the clear light of great bliss. In both India and Tibet, many people have attained accomplishment by relying on this deity. There is nothing greater than Heruka that emphasizes the causes of bliss (i.e., the support of bliss; the drop, the wisdom consort, and the symbolic and symbolic response). Therefore, in this degenerate age, Heruka has greater blessings than other deities. All the Highest Yoga Tantras emphasize bliss and emptiness but do not all particularly focus on bliss. Therefore, this deity is known as supreme because of the emphasis on bliss. There are several hundred sadhanas and Dharma cycles of glorious Cakrasamvara composed by Indian and Tibetan scholars. There are many ways of applying the methods of Cakrasamvara - such as outer, inner, and secret, example and meaning, explicit and implicit, temporary, and ultimate – that are tailored to individual disciples, some more common and some less so. However, without proper knowledge of the techniques for applying these methods to those diverse deities, it is difficult to be clear and to realize their significance. Therefore, one must study the literary ocean of tantra teachings.