PLANEOFSHADOW

Shadowfell: The Shadowfell, also known as the Plane of Shadow, was one of the planes of existence in various cosmological models. Its purpose and characteristics evolved as new cosmologies were formulated. Other names for this plane included Shadowland, the Demiplane of Shadow, and simply Shadow. It existed as sort of counterpart to the Realm of Man, in the sense that it was a reflection, or "echo", of the Prime Material Plane. Unlike the Realm of Man, 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 was 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 had leeched out, leaving nothing but black and white, which in the dimness were more like "dark black" and "light black". A light source only illuminated half the distance it normally would, flames and fires put out less heat, and spells that dealt with light or fire were less predictable and prone to failure, whereas shadow spells were enhanced. On the other hand, although it would not illuminate as far, any light source on the plane could be spotted at a distance of up to ten times its normal range of illumination, such was 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, could be seen up to five times its range of illumination.