Cathedral (engine)

Cathedral was a metacultural engine created by the grey man. By the time Bernice Summerfield was taken there, it was fifteen thousand million years old. The grey man built it in the early days of the universe to introduce randomness and ambiguity, counteracting the strict duality his people were imposing on the universe. It was destroyed by Gabriel and Tanith, but reformed in the shape and identity of the grey man. (PROSE: Falls the Shadow)