What Is Chakrasamvara Practice?
Dr. Alexander Berzin
Chakrasamvara (Heruka) is a mother tantra practice of anuttarayoga tantra. It provides the most detail about the methods for generating the four levels of blissful awareness of voidness within the central energy-channel, enabling access to the subtlest level of mind, clear light. It is one of the mother tantra deity systems within which the six yogas of Naropa are practiced.