Skein of the Lesser Abyss
It is over a thousand years since the eighth cohort appeared at the obelisk, but the Zentacor still watch. Once the skein was a minor stopping point on the endless offensive of the Gith, and later, of the Ilithid slave armies in their retreat. Now it's a quiet place -- almost unearthily so, such that the rare mortals who walk there can sense the terror of endless empty, unfriendly planes of existence stretching below. Nevertheless, the place does see the occasional traveler. Every dimension nexus does. Some stay a while and make thier their lair. Others move on as quick as they can. Some are helped into oblivion by the undying denizens of the place.