A technology from the doomed city of Underhome, brought to the surface by the Undermen. It can be used to power all manner of machines and trinkets to great effect. It has effectively put many of the abilities once held only by Wizards and Sorcerers into the hands of the non-magical.
As if in answer to this, however, Wizards from The Keep have recently discovered that the efficacy of steam technology can be boosted significantly through incorporation of the strange mists within Darakkos, the western continent. These innovations are being called, rather uncreatively, Mist Technology.