Nethersphere

Missy and the Half-Face Man in the Promised Land. (TV: Deep Breath)

The Nethersphere, also known as the Promised Land or Heaven, was an apparent afterlife where several people who had died at various points in time and space were known to have arrived, the destination was also sought by many.

The Half-Face Man said he was trying to get to the Promised Land, but its existence was denied by the Twelfth Doctor. When the Half-Face Man appeared to die after having been impaled upon the spire of Big Ben, he was transported to a lush garden where he encountered a woman identifying herself only as "Missy". She said that he had "made it" and that he was in "the promised land" — or, as she also called it, "paradise". (TV: Deep Breath)

Later — as from the Doctor's perspective — a soldier from the Aristotle appeared to die within the body of a Dalek and then was transported to an elegant tea room, where she, too, encountered Missy. (TV: Into the Dalek) Later still, the Doctor discovered that a ship of robots that had crashed in Nottingham of about 1190 had a programmed destination of "the promised land". (TV: Robot of Sherwood)

A policeman named Matthew in Shoreditch in Clara Oswald's home time, having been killed by a Skovox Blitzer, arrived in an area of this afterlife resembling an office, meeting a man called Seb. Seb worked for Missy, who was busy at that moment, calling this afterlife the Nethersphere. (TV: The Caretaker)