The ominous cloud of fog that covers the surface of the planet Repro 2. The cloud creates multiple 3-Dimensional reflections of living beings. The cloud has caused Repro 2 to become an attraction in the galaxy, drawing travelers who want to see themselves in this manner. It is compared to seeing oneself in a hall of mirrors. As the Tardis is in actuality a living being, the Anti-Tardis was created from the cloud when it came in contact with the living matrix of the Tardis.