- You may be looking for Mictlan (planet).
Mictlan existed in a state of enormous flux. This flux was so corrosive to the rest of the Spiral Politic that it had to be kept on the outer skin of the universe. (PROSE: The Book of the War) As a result, its occupants were immune to time winds or changes imposed on Gallifrey's past. (PROSE: The Taking of Planet 5)
Appearance & geography Edit
The appearance of Mictlan varied with the perceptions of its inhabitants. (PROSE: Alien Bodies) When Entarodora visited Mictlan, the realm appeared as a grey and black landscape with a glowing sky. (PROSE: The Brakespeare Voyage)
The Bone Museum of Mictlan served as a library for agents of the Celestis. It held information on the Eighth Doctor. In addition, there was the Plain of Bones located in this realm. (PROSE: The Taking of Planet 5) The Celestis took those close to death to Mictlan. (PROSE: Autumn Mist)
Entarodora projected her consciousness into Mictlan from The San Grael in order to make a deal with Lord Dervishage involving The Brakespeare. Backup records of this meeting were later given to the Great Houses for use as evidence in Great Houses vs. Scarratt. (PROSE: The Brakespeare Voyage)
Mictlan was destroyed due to the actions of Investigator One, the hermit, and the Fendahl Predator. (PROSE: The Taking of Planet 5) The only known survivors were a Shift, several servants, and the timeships involved in the attack; together, they colonised a small planet early in the universe. (PROSE: The Book of the War)