At the foot of the Ertian plateau lies a broad sub-continent that reaches into the tropics. The northeast is lush jungles inhabited by Ochae’nafod tribes and Asath, while most of the continent is tropical grassland, and smaller areas of jungle.

Several rivers flow from sources in the mountains. The greater river that flows toward the southeast is the Useru, and the large river to the east is the Najoja.

Only three human nations claim Ertia; the old nation of Ertia on the northwestern coast (which once claimed the entire sub-continent), Samdra to the southeast, and Shyon which claims much of central, south, and western Ertia. Several tribes of Ochae’nafod live in the grasslands to the north, far deeper into the grasslands than Shyon settlements will dare reach.