The Shoal was an asteroid on which the Vore originated. (PROSE: The Gallifrey Chronicles) Sometime after the 27th century, the Deindum built a shipyard at the then resource-rich Shoal. The complex they built was larger than most solar systems, and consisted of a hundred planet-sized factory stations. (PROSE: Winging It) The Shoal was the site of a cicatrix in time. Larna was sent by the Time Lords to gather information about it. Marnal, another Time Lord was sent from Larna's relative past, he destroyed the Shoal by detonating explosives. (PROSE: The Gallifrey Chronicles)