Abstract: This study is an ethnographic and conceptual analysis of religious objects, their uses, and mediation of authority within the Universal Church of the Kingdom of God (Universal Church) in Brazil. Drawing on scholarship within media studies, religion and media, and material religion, I distinguish between artifacts used to cement implicit contracts between Universal Church followers and their church community, which I call contractual media, or swag, and those that followers bring to meetings to be blessed and then take home to mediate both good and evil forces in family, work, and social life—these I call portable media. While portable object media are seen by their owners as powerful tools, contractual media, on the other hand, create implicit power relations that keep followers tied to the institutional church in a reciprocal exchange predicated upon expected prosperity as evidence of faithful attendance, fidelity, and personal sacrifice. The physical exchange of material goods in religious spaces constitutes a perpetuation rather than a disruption of institutional religious authority. As infrastructure, contractual object media establish and maintain conditions for otherwise mundane materials to mediate power on a daily basis. Through attention toward portable and contract object media, as part of what I am calling material microstructure, we can further complicate religious authority as it is mediated through objects, not just in one-way flows but as dynamic exchanges and trade-offs between personal empowerment and institutional control.