Formed in the aftermath of the Horus Heresy, the Risum Fabrica is a secretive cult centred around the so called Tech Prophet Ralacus. They hold the belief that all technology will undergo some sort of "re-set" during a galaxy wide apocalyptic event known as the "Technicus Finalus." What this actually concerns in unclear, but for the last millenniums the disciples of Ralacus have alternating between crisscrossing the galaxy pursuing some unknown objectives, and spending their time locked in machine-shops.