2) Shake up political structures, for example, the loss of large swathes of land will lead to realms falling and new ones rising. This was another issue which has been mentioned a lot (probably more) lately.
This will only work well if, rather than simply raising spawn rates overall, spawn rates skyrocket in certain regions around the continent. Otherwise, as Tom has mentioned, large, prosperous realms will have little trouble putting down the spawns as they pop up, as long as they're still active realms as well. Small realms, meanwhile, will have more trouble doing that and maintaining an army.
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