Idea: Natural light - a WTe where you can't use omni lights or stuff like that, you are only allowed to use normal lighting and 2 lighting regions (red and green), green being pitch black. Then make a terrain using the two lighting types.
Suggestion: Something to do with time rifts or time freezes, you know. I was thing some sections of a map super outdated and jarringly transitioned compared to the rest of its environment because of a rift in time. As an example, maybe a big terran city with a sudden small patch of dense forest and a lot of dominion forces guarding it.