The Faerun: the Feywild and Shadowfell

There is one large mirror-plane (or echo-world) of the Prime Material Plane, the Faerun. This plane is split up into two main aspects, the Feywild and the Shadowfell, which are different aspects of the same plane the same way that a coin has two sides. Both the Feywild and the Shadowfell experience time differently to the Prime Material Plane, and travellers to those places experience both time loss and memory loss upon leaving them.   The physical geography of the Faerun is in many ways a twisted copy of Casiphon, with similar overall arrangement of major terrain features like rivers, lakes, plains and mountains. Despite this, few of the mortal-made features of the Prime Material Plane are copied. The geographic features are often accentuated and strange, majestic and twisted.   The Faerun can be entered at certain significant points, especially those in uncivilised and hidden places with a sense of uncanny mystery about them. Dusk and dawn, certain times of the year and certain points in the lunar cycle make it far easier to enter the Faerun. Certain artifacts, especially enchanted mirrors, lead to this place (but not necessarily back again).   The Feywild is the dawn-summer aspect of the Faerun. It and its denizens represent new growth and the flourishing of life, and they are often good-natured, leading travellers astray in mirth rather than malice. Its climate is nicely cool or warm and beguilingly pleasant.   The Shadowfell is the dusk-winter aspect of the Faerun. It and its inhabitants are involved in the cycle of death and decay, and are often malicious and arbitrarily cruel. Its climate varies between uncomfortably hot, cool and bitingly cold.