Heruka is an enlightened Deity of Highest Yoga Tantra who is the manifestation of the compassion of all Buddhas. By meditating on Heruka body mandala we receive powerful blessings from Buddha Heruka that free us from all obstacles to spiritual practice, and enable us to experience profound spiritual realizations and attain enlightenment quickly. This extensive Heruka self-generation meditation, which is the very essence of Vajrayana, is for those who have received the Highest Yoga Tantra empowerment of Heruka body mandala, and who have a sincere wish to gain deep realizations of the generation and completion stages of Heruka body mandala.