what you now see said:The walls, ceiling, and floor of this structure are covered in strange runes whose twisting shapes poke unpleasantly at your mind.
In addition, the chamber's inner walls curve at odd angles and end in columns. They serve no apparent architectural purpose, but appear to be part of the runic pattern itself. To the north beyond these walls, a dim light flickers and sways, as though something is moving before an open flame.