Mairillion is the “Middle Earth-like” dimension in this campaign. It is most of the characters home, and is the base setting. It is very diverse in its geography, social systems, politics, and languages, but has a general sense of unity regardless.
Mairillion has extensive geography, in the north west, you can find The Devils Causeway, a treacherous stretch of land with the Dwarven Fortress Stonehold at the end of it. The southwestern continent is known as Temvarico, containing the war torn countries Vicis and Tempus. The southern realm is known as the Frost. It is a mysterious and dark wild land. To the far north is the desert Kitath.