Mistman

A benevolent race of humanoids formed from mist that appear as a warning before great misfortune. They can easily hide by spreading themselves thin, and can reappear by condensing themselves. They have no voice, but are otherwise very good at communicating. Humans that care enough to know of their future will always have a mistman at hand, usually obtained through bribery. Mistmen are known to only accept spheres made of rare metals, such as silver and gold. As a result of their expensive taste, they also have the ability to discern the makeup of an alloy, down to the smallest and most impractical measures. If you present a mistman with any amount of riftmetal, they will shy away from it and dissipate.