You are in a glittering cavern seemingly cut from the heart of an enormous geode of blue
chalcedony. A misty, iridescent river weaves its way through the chamber, around pillars,
under arches and between curtains of faceted, ice blue stone.
The river's constantly shifting nature makes it almost impossible to identify its exact
points of origin or egress from the room.
There is a misty threshold on one of the walls.