Charystan Cluster (Endhaven Supplement)
From D&D Wiki
The Charystan Cluster is the largest of all the clusters in Endhaven. The western end abuts the Savage Seas, having a mediteranean climate. The central plateau hosts thousands of farming settlements along with a cooler environment more prone to extremes of hot and cold. The eastern river valleys once hosted their own rival kingdoms and continue asserting their will whenever possible.
The cluster itself is unusually free from planar influences. Those influences that do appear tend to be small or isolated.
The cluster was once dominated by the Dragon Empire. The cluster is now dominated by the Malachite Empire, ruling from the great city of Charystos.