Shadowfell

The Shadowfell, also known as the Plane of Shadow, was one of the planes of existence in various cosmological models. It existed as sort of a counterpart to the Feywild, in the sense that it was a reflection, or "echo", of the Prime Material Plane. Unlike the Feywild, it was a bleak, desolate place full of decay and death.
The most striking and immediate impression a visitor to the Plane of Shadow experienced is the lack of color and light; no sun, moon, or stars adorned the vault of the inky black sky, and all things looked as if the color have been leeched out, leaving nothing but black and white, which in the dimness were more like "dark black" and "light black". A light source only illuminates half the distance it normally would, flames and fires put out less heat, and spells that deal with light or fire are less predictable and prone to failure, whereas shadow spells are enhanced. On the other hand, although it will not illuminate as far, any light source on the plane can be spotted at a distance of up to ten times its normal range of illumination, such is the contrast to the constant gloom, similar to a star in the night sky. Even a light source that only put out shadowy illumination, like a darkness spell or a lantern burning shadowlight oil, can be seen up to five times its range of illumination.

Type

Plane of Existence