Dear Uncle Pernicious,
Last night me mates and I were chasing a black-hearted necromancer through a dark dungeon and he jumped through a magical portal. ‘Not such a big deal,’ thought we. Our wizard figured out the command word and we followed him through. We came out the other side in a city! But not a regular, normal, sane city…it was a place of dark, soot-covered buildings impossibly tall, carriages that hissed and smoked and moved without horses, and people with round little windows over their eyes who used magical rods that belched fire and launched some kind of sling stones with unearthly speed. (And they hurt. A lot.) We gave up on the necromancer and high-tailed it back to the real world.
My question, Uncle, is what kind of a place was that? And what kind of people could possibly adventure there?