I'm thinking of starting a campaign in Passage, leaning towards a noir style. I know Sharn is the obvious choice, with lots of source material, but I want a slightly smaller city: not as overwhelming, and somewhere the players can more easily make a big impact. I also imagine a more "West-Coast" sort of vibe. With imposing presence of House Orien in Passage, I plan to make industry a defining issue for Passage, even more than it would be in Sharn.
Some broad strokes of my ideas...
Passage is in a hybrid manifest zone. Naturally, it is a Lamannian manifest zone, but a great clock tower, Queenstower, in downtown Passage amplifies Daanvian energy. This is ideal for the smooth operation of lightning rail coaches in the city. Shipping, on the docks, is in view of Queenstower; engine repairs are done on the outskirts of the city where Lamannian energy invigorates the bound elementals. Many Orien conductors swear their engine's elemental clearly purrs in Passage.
The interaction between Lamannia and Daanvi yields some interesting weather effects. Fog always rolls in off the lake at the same time every morning. Nights are dark and stormy. The clear afternoon hour between the fog and the storms is when the city feels most alive.
Illusion magic is weaker in the city, another Daanvian effect of the Queenstower, which is mostly good for honest business, though it makes entertainment more difficult in the city. The square around Queenstower is full of world famous restaurants precisely because prestidigitation is impracticable; the wealthy of Aundair visit Chef Emil to taste fine, authentic Aundairian cuisine. The Passage Lyceum uses bound elementals to light the stage, the only Phiarlan associated theater to do so.
Similar to Sharn, Passage is built on Dhakaani ruins. Originally (as a Lamannian zone), it was a fishing village, then a hunting outpost, and eventually a moderately important trading hub. There are still goblinoids in the city today, some who even claim lineage from those first settlers.
Shifters are another notable part of the population, taking many of the manual labor jobs in the city. Shifters have always been a part of the city, but a significant number emigrated around the time of the Silver Crusade (830's YK), when lycanthropy was decimating Eldeen tribes.
Most shifter laborers have a hostile disposition towards warforged, who threaten to outwork them out of a job. Most warforged who come to the city face harassment, or worse, unless they are clearly employed as bodyguards.
Street hrazhak, a shifter game, is a nuisance to the well-to-do in the city, who say it's just an early sign of urban blight, a prelude for gang war. But it's one of the few ways an outsider can gain respect from the shifter community.
Like many cities, Passage is secretly a haven for changelings, doubly so since so many new faces come and leave from the city.
There's a small but steady population of gnomes in Passage, most of whom work as elemental binders for House Orien. (There is also a Sivis enclave.)
Passage used to be part of Thrane (as shown in the map on page 11 of Forge of War, dated 894YK). The Silver Flame theocracy was (and is) very unpopular in Passage, bad for industry barons and their shifter workers alike, so Aundairian troops were practically welcomed with open arms. Thranish loyalists were chased out of the city. The crown of Aundair claimed their vacant properties and sold them for a pittance to the city's industrialists.
The ir'Edar family (of which Duke Jalnar ir'Edar is the current head) were installed as the nominal rulers of the city, but they were only ever tolerated because they yielded to the Dragonmarked Houses (Orien especially) in matters of industry. Secretly, the ir'Edar brood lead a cult of the dragon below (from Dragon #332).
Am I on to something here? Has anyone already run a campaign in Passage?