The Imperial word calerus has come to describe the many crystal forests that now dot the continent of Xeryn. The vast majority of these forests can be found in the east, in the province of Sargot Kala but some have grown in the central region of the Empire. Some caleri can be visited in the game, such as Loom, or the twin caleri simply called North Calerus and South Calerus.

'They may be called the 'Children of the Calamity' but make no mistake, dominus. These terrible creatures are far from being child-like. When you see one, do not hesitate; they won't.'

Avernum is the most important city in the Northern Searing Plains. The reborn Empire moved back to the scorched and abandoned region soon after the Calamity and found it ideal to settle because of the new resources that can be found in the vicinity: salt, rare minerals, and even obsidian. Thus, Avernum was built at the center of the Smolderbone Flats. The city mostly lacks the religious apparatus of large provincial settlements, but has a fairly large military presence there under the direct control of the Prefectus, its governor. Rumor is that due to its backwater status, the city of Avernum follows Imperial regulations more loosely, and it has become essentially the private kingdom of the reigning Prefectus.