Hmm. Lightbringer cities being beautiful pools of light and perfection DOES sound like a good idea, and would mean that climate change would wipe out normal cities and leave just your dark empire vs the kingdom of light, for the final battle. Current plan is for lightbringer-only buildings to exist, so lightbringers get to expand their power over time to counter yours. Maybe they could have giant glowing trees, embracing the natural power of light, which radiate out a region of improve climate? I'll put it in the plan for phase 2.