Atlas
Guide to the Imarel Multiverse - by T.A. Saunders ©2014 v1.0
The universe is not a singularity onto itself, but rather a single layer of several that make a composite reality we know as the Multiverse. Each layer could be considered a universe onto itself, though they do not exist one on top of another or in any scheme of three dimensional design. Rather, these planes co-exist over top one another, in the same space and the same relative time. Travel through these dimensions is done via several means, all of which are some manner of magic (arcane, divine or mystic). Technology on Imarel has not been able to, without heavily relying on magic, produce a gate of any kind into another dimension.
Below is a comprehensive listing of all the known planes of existence and what to expect upon traveling there. As one can expect, traveling to some of these dimensions can be fraught with hazards that can kill a mortal being nearly instantaneously. In some cases, such death could be without any means of recover or resurrection. Laws of nature and physics are entirely different on each plane of existence, though they can be similar. The assumption that a mortal being can survive in one plane as well as another is foolhardy. Even Etheric Will-shapers, who can walk between dimensions must take precautions when traveling the planes or suffer the same fate as one not so gifted. Planes, when referred to by their given name (ex. Indaris, the Bright Heavens) are known as realms. The terms can be used interchangeably, but if one is referring merely to other dimensions in a generic sense, the word plane is used. Nobody is sure where the names of the various planes came from, aside that it had been the High Asyndi that had named them. The prevailing theory is that the various realms were named after immortal beings destroyed in the first Godswar that formed this iteration of reality.