Geological / environmental event
The long period of destruction and damage in Ilobel brought on by unrelenting storms.
After two failures in Renad, Levrin Feneyl was angrier but less capable than ever. He lost plenty of soldiers and ships, but the military conflicts would be the least of his kingdom's problems. For over a month, his people would be hit with vicious storms. At first it was light rain, but then thunderstorms came. Harsh winds blew over infrastructure and lightning struck down across the land. Eventually, the harsh winds brought a hurricane. By the time it was over, any infrastructure still standing was rotting or flooded. Stone buildings held the best, but it would take days or weeks to clear the keep's lower chambers of water.