I keep coming up with this idea of a part of the Ghost Zone that's kinda its own pocket dimension where some very ancient ghosts habit, with ancient i mean like they are so rare that you can barely find them in other places of the Ghost Zone.
This whole area has like its own ecosystem in a way that everything is sort of connected and existing in a harmonic balance.
And its also very dangerous because the ghost creatures that are in there is really powerful, so very few ghosts dare to explore the place because of that.
It's its own little world that is very secluded from the rest of the Ghost Zone and very few know how to access to it. It's more of a old legend that keeps being passed down because barely anyone has seen it.