The Shadow zone is an alternate dimension outside the main reality. Its existence means that anyone trapped within it is unable to interact with normal space as they are out of phase and seemingly encased in a limited amount of space.
It is especially used as a euphemistic expression of death. It is referred as a dark other dimension,
surrounded by purple fog. A place where you can be banished to decay. Shadow zone is a realm seen by entities with higher sentience.
Meaning awaits approval from a moderator