Urizen's Wall
"Urizen's Wall" was a term used to describe what lay between the Universe and the Great Black Void or Outer Void. (PROSE: The Book of the Snowstorm [+]Loading...["The Book of the Snowstorm (short story)"])
One particular surviving Archon in the post-War universe, "long thought dead", personally made a dent in Urizen's Wall. Although it was the smallest of holes, "many impossible things can fit through the eye of a needle". Although Claret supposed this Archon was Mortimus (PROSE: The Book of the Snowstorm [+]Loading...["The Book of the Snowstorm (short story)"]) - and indeed another account concured that the Monk, again calling himself "Mortimus"", existed in the post-Time War universe (PROSE: The Persistence of Memory [+]Loading...["The Persistence of Memory (short story)"]) - a seemingly unconnected account showed the Fourteenth Doctor "invoke superstition at the edge of the universe" (TV: Wild Blue Yonder [+]Loading...["Wild Blue Yonder (TV story)"]) summoning in at least the Toymaker (TV: The Giggle [+]Loading...["The Giggle (TV story)"]) and his offspring Maestro, (TV: The Devil's Chord [+]Loading...["The Devil's Chord (TV story)"]) with the Toymaker warning that "[his] legions are coming". (TV: The Giggle [+]Loading...["The Giggle (TV story)"]). Yog-Sothoth also entered the Universe, as the Snowstorm, in the aftermath of the surviving Archon's denting of the Wall (PROSE: The Book of the Snowstorm [+]Loading...["The Book of the Snowstorm (short story)"], whether or not this and the Fourteenth Doctor's gambit were related.