The latest issue of Religion in the Roman Empire has a nice bevy of articles on the polemical use of terminology about ‘mystery (cults)’ in connexion with heresiography. I copy the TOC here:
Francesco Massa – Introduction: ‘Mysteries’ and ‘Heresies’ between Practices and Notions
Claudio Zamagni – The Elenchos and the ‘Mysteries’. Constructing Heretical Identity in Ancient Christianity
Anna van den Kerchove – Mysteries, teletai and Mithras. Manichaeism in the Heresiological Discourse
Flavia Ruani – Mystery Cults and Syriac Heresiology: A Fruitful Polemical Association?
Francesco Massa – Mystery Cults in Epiphanius’ Panarion. Tracing the Link between Heresy, Philosophy and Ritual