Avalas

The first layer of Acheron is also called the Battleplains, for it contains the most cubes—and enough armies and fortresses to populate them. The clash of distant cubes is indistinguishable from the closer clash of a nearby battlefield. The cubes vary from city-sized to continent-sized. The smallest cubes are usually the oldest, having been reduced to their present size by eons of collisions.

The Heroes of the North arrived on Avalas through the Lion's Gate during Lord of the Iron Fortress, and returned for the Iron War.

THE ORC-GOBLIN WAR AMONG THE CUBES

The realms of Clangor and Nishrek were once a single cube, but the opposing deities of each realm finally managed to separate their realms into two wholly separate cubes. Though they are separated, enmity between the goblins of Clangor and the orcs of Nishrek is still great. Though the rival deities can prevent an entire cube face from being crushed by an opposing cube sent hurling through the void, that doesn't stop either side from trying. Most battles are now fought when one side manages to land an invasion force on an opposing cube.