In a dismal swamp in the wilderness, something has arisen. It seems to have happened virtually overnight, not that many people have a reason to go there and check. It seems that walls of stone rose from under the murky water - were they always there, buried and forgotten?

The risen stone walls have been grown over by thick, black trees and vines emerging from the ground. Twisting above the structure, they form an unsettling facsimile of a peaked roof, with gaps between them letting in some faint, greyish light. The building is entered through a long hall, which widens halfway through. There doesn't seem to be any door, but it's not as welcoming as it sounds. Beyond the entrance is not the moist, unpleasant place one might expect, but a somber space of stone and wood. The court is deathly quiet, at least until someone happens across it...