Arctic

Arctic environments usually appear near the northern and southern extremes of a world, though extreme elevation, unusually shaped worlds, and supernatural forces could result in arctic terrain elsewhere.

Terrain typically difficult or greater difficult terrain
Resources scarce food (broken ice floes that allow for fishing, breeding grounds for seals or whales)
Secret thawed passes that allow ship travel, hidden caverns, isolated communities of arctic dwellers

Arctic Geomancy

Icy winds carry crystalline flecks of snow that distort the horizons, and desolate nights bring undulating light shows to the black skies. An arctic environment draws a geomancer toward illusory magic that replicates the splendor and mystery of the sparkling tundras, and to long-lasting protection against the elements.