Dark Sun: The Scorched World of Athas
Although alien to Jarvix and his allies, their companions at the time were not as uncomfortable in the Mists as he would have suspected.
The Mists are purported to have many strange powers such as transporting travelers into distant lands far from where they began. Nefarious acts seem to draw the attention of the Mists, granting both boon and curse to those who commit them. The Vistani, such as Melantha, have a strange connection to the Mists.