|Picture this, with ice, snow, and vikings.
Did you know that the pyramids of Giza and Teotihuacan were built off the same "blueprint", delivered by an alien culture to early man? The pyramids in both places are aligned to represent the stars in the belt of the constellation Orion. Teotihuacan, City of the Gods - perfect inspiration for what the Black City might have looked like on the surface.
I've had some real-world stuff going on that kept me from finishing the Black City map last week (family, kid's birthday, plus actually DMing a couple of table-top D&D sessions…) Back on track, it's coming along well.