Nightwalker Pit

Few darker demiplanes exist in the Deep Ethereal than the Nightwalker Pit, both figuratively and literally. This isolated realm is 12-miles deep but it’s not shaped like a typical demiplane. Instead, the opening through the ethereal curtain leads into a pitch black tubular realm about 1 mile in diameter. It extends into nightmarish darkness for 12 miles which is filled with horrible monsters culled from the most shadowed corners of the Abyss and other lightless regions of the multiverse. Does some malevolence draw these creatures to the Nightwalker Pit? Or are they spawned naturally? What lays at the bottom? None have found out and returned.

The Nightwalker Pit is also the best example the members of the Etherfarer Society have given showing the Ethereal Plane can spawn demiplanes on its own that are just as deep and varied as any created by a powerful wizard or priest on the Material Plane. Nothing seems to lay claim over the Nightwalker Pit, and the horrors inside have no desire beyond tearing travelers limb from limb that stumble into its feared ethereal curtain. Others say that such an evil-tainted demiplane must have been created by some external force, such as a devil prince or yugoloth warlord, as no other demiplane of such pure evil has been found since. Is there a strong connection to the Negative Energy Plane in the Nightwalker Pit? Such a presence would be suggested but so far not yet been proven.