Rain of Colorless Fire
As retaliation for the Invoked Devastation called by the Kooluk Empire during the Great War, a cabal of Karakan Mage-Priests brought down the Rain of Colorless Fire on their hated enemies. The skies above the Kooluk Empire opened, and all beneath were burned to ash.
The Great Migration
Though some refugees from Karakas migrated east to the new land called Avernos, most fled north to the mountains or to the shores of the vast sea where their ancient cultures continue to flourish in the Savage Lands.