Governments and mega-corporations have found a way to cheat the the system, the Dream Tanks are their most valuable assets.
One of the most common and well recognized SimSense parlors of the Cosmic Era
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.
Once one of their number, the eternal outcast wishes to take from the Elves what they hold dearest - their dreams, their past, their future.
Ages past the Woodking fell into a deep and terrible slumber, and from the fever of his dreams and nightmares the wooden dungeon of Limberlost grew.
The babies of a small village has been disappearing lately, rumour has it that a demon living in the forest has taken them. The monster has the appearance of a shriveled old woman. A hag, disheveled, with maniacal appearance, wild-looking hair, and an oversized gaping mouth. Long pendelous breasts. The villagers say she eats the newborns and has sharp claws that are created for mangling. No one dears to challenge her, enter the PCs.