The Shadowfell has existed for as long as the mortal world has. It is a place of shadows where twilight rules, and its various peoples hold close their nefarious plans and draw power from the dark while avoiding its corruption and the identity-draining waters of the afterlife.

As a place of mortals mixed with minor planar powers, it has been congenial to the quicksilver fey, the nihilistic satarre, and ambitious humans willing to leave sunlit and wholesome lands for a more malleable, more dangerous, and more powerful realm.

It is a place with a constantly shifting landscape, where even the keenest rangers can get lost. As well as a place where memories function as currency, making pickpockets much scarier.

Gur the Black Flame was the ruler of the realm until The Imprisonment of Gur.