The term "Human Semen Eucharist" is not a recognised or documented ritual or practice among Manichaeans or any mainstream religious group. Manichaeism was an ancient religion founded by the prophet Mani in the 3rd century CE. It combined elements of Zoroastrian, Christian, and Gnostic beliefs. The central tenets of Manichaeism focused on the struggle between the forces of light and darkness, with an emphasis on asceticism and spiritual purity.