The Enclave was an area of space on the threshold of the Obverse, where it met the usual universe. It was little-known to beings of the wider universe like the Time Lords. It contained the Glass City of Valcea, the moon of its world, and the planet Ichor, and was inhabited by the Glass Men, Ghillighasts, Sahmbekarts, Steigertrudes, and enormous owls.
Daedalus created Corridors with Obverse physics, and sent them out from the Enclave to tie together universe and Obverse and cause the races of the different galaxies to go to War. (PROSE: The Blue Angel)