Cult of the Laughing God

Worship of a long forgotten Goman deity (of mirth and murder, the cult see the fabled killer Saucy Jack as a messianic figure). Seeking otherworldly power (they are seeking a way to imbue themselves with the god’s powers and have been experimenting on people including, it seems, Jackdaw and Rupert Uffington to try and find the perfect vessel).

Causing the plague? (each time they conduct a ceremony there is a spike in incidents of the Laughing Plague).

Noble involvement (it is believed that the noble Uffington Family are somehow closely connected to the cult).