They say you give up a few things, chasing a dream. In those mists that's the literal truth, for every dream of yours that comes true, a piece of yourself, mind, body, or soul, gets taken by the mist. Worst part is, you won't even know what the cost of your dreams are until you go to leave, and by then you might not even have a mind left to change...
A fragment of the mists of creation, drawn to those desperate to make their dreams come true. Suitable for any magical fantasy setting.
A civilization which constructs of irregular shapes constructed of a light metal, heaped together so that they stand on each other; these structures rattle and bend in the wind or at a push, but ultimately hang together except under heavy force (such as cannonballs, falling stones, floods)