Cosmology

The cosmology of Sitiath is similar to the cosmology as described in the D&D 4th Edition DMG and the Manual of the Planes, but it has some distinct differences. There is no Far Realm; most aberrant creatures have their origins in the Realm of Twilight. This isn't a huge change as the Far Realm was never much of an adventuring destination. The biggest change is that there is no Elemental Chaos. It has been replaced by the four elemental planes (air, earth, fire, and water) and by the two energy planes (positive and negative). In the cosmological history, there was no battle between the gods and primordials. The greater gods are responsible for the creation of all of the planes, though lesser gods hold dominion over some of them, and those primordial creatures that do exist are also creations of the greater gods.

The best way to visualize the cosmology of Sitiath is to think of it as a big sphere. The material plane, Sitiath itself, sits at the core of the sphere.

The first layer surrounding the core is the energy plane, made up of the positive and negative energy planes. These two planes sit opposite of one another surrounding the world, and the sun and the moon comprise the cores of each plane. The energy planes rotate around Sitiath each day. The sun and moon sit at an angle relative to the equator, about 25 degrees above/below the equator of the material plane, so that when the energy planes rotate around Sitiath, there are some parts of the world that are always in darkness and always in light (the north pole is always in light, while the south pole is always in darkness).

The next layer of the sphere is the elemental plane, made up of the four elemental planes. Each plane comprises one quarter of the plane. These planes rotate around the world, though they do so very slowly (one revolution per year). The rotation of these planes is responsible for the changing of seasons on Sitiath. The Plane of Air is responsible for the spring season, the Plane of Fire is responsible for the summer season, the Plane of Earth is responsible for the autumn season, and the Plane of Water is responsible for the winter season. All four planes meet above the north and south poles, leading to a lack of seasons in these regions, though the weather in those regions is very inconsistent (except for the temperature). The elemental planes, along with the energy planes, make up what most scholars refer to as the Inner Planes.

The final layer of the sphere is the Astral Sea. It doesn't rotate around Sitiath like the elemental and energy planes do, and it is the only infinite plane in the entire cosmology. All of the Astral Dominions exist within the Astral Sea.

All the planes of the cosmology are mutable, though some are much more mutable than others. The rules for mutability on page 10 of the Manual of the Planes can be used on any plane, but the T# will vary from one plane to the next.

Material Plane

Inner Planes

Astral Sea

Astral Dominions