The cult of the Thirty-Seven Lords is distinctively known for its practices of spirit possession although possession by spiritual agents may be found in other domains of Burmese Buddhist culture. What sets apart the practices observed in the cult of the Thirty Seven Lords is a form of individual and relocatable possession contrasting with traditional rituals linked to the locality and allowing for the professionalisation and the autonomisation of the ritual role of spirit mediums. Ceremonies of possession for the Thirty-Seven Lords mobilize communities of followers in which bonds of dependence with the nats are mediated by ritual masters, married to a nat, such bonds fashion these communities on the model of “clienteles” whose dominant authorizing principle is spirit possession. Spirit possession is what allows the cohesion of the spirit mediums practices that can be observed particularly during the festivals and can be said to constitue an autonomous ritual domain in the Burmese Buddhist culture.