The Null
The Null was an interdimensional realm once described as “beyond” the Void Between Worlds, though it could also be viewed as an aspect of the Void.
Because the Void was non-Euclidean and had more than three or four dimensions, it was possible to “pick a notional direction that’s ‘away from any universe’ and ‘away from any landmark’”. Going “far enough” in that “direction” would lead to one eventually “disappear[ing] into a dimensional stratum of absolute nonexistence”: the Null. While previously-extent entities which disappeared into the Null were “never seen again”, it was possible for the possibility waveforms within the Null to “collapse” into “real” entities which materialised outside the Null, known as Null-entities or Null-creatures. The most famous of these beings were the Bunny Everyhares and Bunny Nullhares, for whose benefits Jenny Everywhere eventually managed to create a paradoxical haven of existence within the Null. (PROSE: Who Laws the Lawyers?)