Limbo is the border between Cosmos and Chaos, and interfaces with Chaos, Materia and Tartarus.
The world is known variously as the Shadeworld, Shadowland or Shadow World, World of Shades, the Borderland, Outland, Ectopia or simly Echo.
In Materia, Limbo is most easily accessible through reflections. Sometimes a mirror or other reflective surface in Materia will show the Limbic counterpart, rather than the normal reflection.
Limbo mimics nearby worlds. There seems to be a Limbic area corresponding with any place in Materia.
Limbo is entered bodily rather than spiritually. Those who would travel bodily to other places, whether in their own material world or another, usually enter the Shadeworld.
Spatial relationships are different in Limbo, however, and seem to be inconstant.
Limbo lies in perpetual twilight. Nothing casts shadows here, even artificial light fails to produce them, dimming and diffusing irrespectively of intervening figures.
Icy wind blows almost incessantly in Limbo, though its direction varies constantly. The cold of Limbo is as ubiquitous as the gloom.
People and animals encountered in Limbo will usually be fetches