Finish an Era with a Village which has 250 Village Prosperity and only uses Minerals
You want to start with Quartz (Rock Giant’s Precious Minerals), and plenty of it. Once you finish your village’s first project hoist the desert ambassador onto the Rock Giant’s shulders and then upgrade everything with potent aspects to Onyx, then apply two more potent buffs.
Keep doing this, adding new mines as your village expands, and you can smash this target with ease; just try and avoid your little followers starting a war…
If you are having issues with war then you’ll want to use a handful of rattlesnakes early on to mediate the village’s greed.