- You may be looking for Needle (Red).
The Needle was an object one light-year long and fifty thousand kilometres in diameter, with one end affixed to a black hole. (PROSE: The Infinity Doctors) It eventually became the center of a great empire at the end of the universe. (PROSE: Father Time, COMIC: Miranda)
The Needle's history often interacted with the Eighth Doctor, (PROSE: Seeing I, Unnatural History, Father Time) linking him to the life of an alternate incarnation. (PROSE: The Infinity Doctors, Father Time)
The Needle had been Savar's TARDIS, but was caught by the black hole's gravitational pull and was stretched out when he tried to escape it. (PROSE: The Infinity Doctors) Savar was later retrieved by the Time Lords, eventually having his eyes returned to him as well, (PROSE: Seeing I) but his TARDIS was abandoned and it had been stripped bare. The TARDIS had been a male, and he pleaded with Savar to not abandon him when the Time Lord realised escape was impossible. (PROSE: The Infinity Doctors)
Billions of years in the future, most of the people of the universe relocated to the Needle after a great disaster. (PROSE: Father Time) In the Post-War universe, the four surviving elementals created an empire centered around the Needle (COMIC: Miranda) and another Throneworld, and included planets like Endpoint. (PROSE: Hope, COMIC: Miranda) This empire decayed, eventually only ruled by the Emperor until his assassination. (PROSE: Father Time, COMIC: Miranda)
One of the inhabitants of the Needle was Griffin, who interacted with the distant past. Daniel Joyce often worked with powers from the Needle for his Advanced Research Project. (PROSE: Unnatural History)
Miranda Dawkins travelled to the future and became the Empress of the Needle. Many assassination attempts were made on her life by Prefect Ferran. Miranda eventually had a daughter called Zezanne on the Needle. (COMIC: Miranda, PROSE: Sometime Never...)
A few decades before the universe ended, the Needle was almost completely abandoned. The Doctor travelled there in search of Ohm. The end of the universe was a starless, grey void. (PROSE: The Infinity Doctors)