The Bane of Sorcerer-Kings (EAFW)

As the sorcerer-kings began their reign of terror in earnest, their wars with clerics and constant use of defiling magic eventually attracted the attention of the druids. The mysterious druids of the wastes were at first no match for the kings, and their blood ran freely over their guarded lands in what has come to be called the Eradication.
But through this painful experience, the druids began to find ways to dampen the dark sorcerer's defiling magic, and were even able to win a few battles, battles now long forgotten by history. The king's banded together after these setbacks, and chased the hated druids back into their wastes. There they were hunted to virtual extinction, and many thought that their order had vanished from Athas forever.
Now, the few druids who will talk about the present say that they are biding their time in the mountains, in the deserts, and in the valleys of Athas. They train for battle, learning to fight the defilers' magic, and carefully rebuilding their ranks. One day, maybe soon, they say, druids will rise from the earth with their ancient, fallen brothers and erase the mark of the sorcerer-kings from Athas, only then will they purge their bitter memories.