Crystalmist Mountains

The Crystalmists are a fictitional mountain range bordering the Dry Steppes with Geoff, Sterich, and Yeomanry in the Greyhawk Campaign setting in the Dungeons & Dragons role-playing game. The Crystalmists were the source of the Giant invasion Against the Giants: The Liberation of Geoff in Common Year CY 583/ Flan Tracking (FT) 2463.

Fictional Culture Reference
In the Living Greyhawk Campaign 2000-2008, the Geoff triad mentioned the crystalmists as a cultural reference:  Teithi tua mynythi (ta-hee-theh too-ah meh-neeth-ee, tr. goes to the mountains) Traditionally, this is not a nice thing to say about someone. Gyric common sense knows no wise or sane Gyri (gear-ri, tr. geoffite) would enter the Crystalmist mountains (because of the giants and other horrors that live there). Therefore, a person who acts particularly foolishly (or insanely) is someone who teithi tua mynythi. Since the invasion, though, some of the more impetuous and daring Gyri who raid our enemies in Gyruff have taken to calling themselves teithi tua mynythi as a term of honor. 