Oubliette of Eternity

The Oubliette of Eternity was one of the darkest secrets of the Time Lords' Celestial Intervention Agency.

It was a device installed in a chamber that was used to disperse criminals convicted of high treason. This was accomplished by supposedly erasing them from history so that they never existed. However, it was also used to dispose of Gallifreyans who learnt of its dark secrets. Rather than erase them, it cast them into a Universe filled with Anti-Time and transformed them into Neverpeople. (BFA: Neverland)