A Special pocket Dimension / Reality is a extremely rare, small reality space with extremely varying size and dimensionality, ranging from around a femtometer to a couple million lightyears at the very extremes.
The difference between a Normal and Special pocket dimension is pretty complex, so here is a graph of all the details and differences:
| Normal Pocket Dimension | Special Pocket Dimension |
| - Has a generally 'Normal' set law of physics
- Can be *relatively* easy to artificially create - Very common compared to special pocket dimensions - Limited dimensionality, 0d to 11d is most common, but any positive finite number is still allowed - Very stable in structure, almost never collapses |
- Free in terms of bound laws of physics
- No known way to create; only found naturally or from a high level god or entity - Very rare, the only places where it is considered 'common' are usually where gods reside - Can have up to infinite dimensionality and even negative dimensions - Highly unstable and chaotic, however still isn't likely to collapse |
Special Pocket Dimensions are the type of universes that reside in the Primordialverse, so any studying about their properties is usually done around The Universe Swarm where they have all split off the Primordialverse.