Meridium

Third Era
After Meridian became tidally-locked with its sun after the Second Battle of Terminus, three distinct habitable zones developed — a small section in the center of the sunward hemisphere, the equator, and the dark side.

Sunward
The sunward hemisphere of Meridian is dominated by a massive inhabitable desert. While the desert has been given several names over the course of its history, it is generally referred to simply as The Great Desert. Directly at the center of the desert lies a large body of water known as the Circle Sea. A small patch of land surrounding the sea is the only habitable area on the sunward hemisphere. This area is home to five major cities, Rathiar, city 2, city 3, city 4, and city 5, as well as numerous small villages.

The Circle Sea
The Circle Sea has an area of around 50,000 square kilometers. It provides the surrounding area with water, which has created a massive oasis at the very center of the Great Desert. While travel via the sea is common, few sailors will venture beyond sight of the shore. Very few of those who attempt the chart the center of the sea make it back alive, and even fewer make it back fully sane.

Even though the danger is undeniable, many still try to reach the center of the Circle Sea. For there's a legend that at the exact center of the sea — where the sun shines directly downward at noon — lies the island of Majutsu-shi. Those who would discover the island and face its untold dangers would have any wish of theirs granted.