Active Random World Shaping
tl;dr version: random terraforming effects occur each game turn.
This may not be moddable, but the terraforming spells in Elemental remind me very much of Populous; couple that with the broken world theme and the perfect fusion results: The world is still actively being broken! Random terraforming effects occur each turn in territory that has not been claimed for either kingdom or empire.
Moddable or is this idea something that Stardock would have to implement?