To give you an example, I'll post the description of the third city above (the one with the Titan):
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A very special city, it is also known as the City of Mirrors. It is ruled by emperor Zotis, a Chaotic Neutral Titan that is always in human (medium) form. 350 years ago, a group of adventurers led by king Kewadis, the former ruler of the city, went to the plane of Limbo to try to grab a lost artifact: the Bracers of Ugandis. These bracers allow the wearer complete control over 1000 of the creatures known as the Nerra, as well as the ability to summon them permanently from a mirror (1 per hour). However, the bracers where the property of Zotis. When the adventurers arrived in his lair, he captured them all. When he learned of the king, he gave him two choices: either Zotis would kill them all and go destroy his beloved city, or either the king would return with Zotis and proclaim him his heir. Such is the way of chaotic creatures… The king decided on the second obvious choice, and after his death, Zotis took control of the city. He then proceeded to slowly replace the normal city guard, watch, and army with Nerrii.
The city is full of polished bronze plates at each street corner, allowing the Nerrii to travel very quickly in the city. Because of the spiritual desolation, a drug called the Dreamweaver (a phosphorescent mushroom) is very popular. It costs 1 g.p. per dose, and is an hallucinogen that lasts 2 hours. A will save DC 10 must be made or the person receives 2d4 Wis. damage. The day after, if the initial save was missed, another will save DC 5 must be made or there is a permanent 1 Wis. loss.
1- The Palace of Mirrors. There used to be a castle at this place, but Zotis personally destroyed it and had the populace build him a palace, with polished bronze plates lining the inside of the walls. It is quite a magnificient achievement.
2- 3- 4- 5- These gates are guarded by 4 Kalareem and one Sillit at all times.
6- Temple of the Horizon, church of Fharlanghn. High-Priestess Debandria Artandrianisonian (NG hf C14) is the leader. She despises Zotis, but knows how powerful he is. She is much too old to challenge him, or so she feels.
7- The Fortress. This is the prison, where all the enemies of Zotis are sent to rot the remainder of their lives.
8- The Market. Although the general people feel oppressed, business is booming, and the market is very active.
9- Noble estates. Many noble merchants live in this green part of the city, but they are more Zotis boot lickers than truly independent nobles. Some of them use slaves.
10- The Mirror Gate, mage guild, currently under the power of Syakanos, a 14th level Wizard Sillit. He is, of course, under the control of Zotis.
11- The Harbourmaster, currently Georey Vanlyant (CG hm F5).
12- House of Knives, thieve’s guild. The current guildmaster is Scotdan the Green (LN em T17). He is quite good, and so far has evaded Zotis’s attempt at capturing him. The fact is, Zotis only gives a half0hearted effort in the matter.
13- The Singing Mouse Inn. Innkeeper Zed Stepherson (N hm S8), His singing mouse trick made his Inn quite popular.
14- House of Marandria Tedanean (LG hf W6). She used to be the right arm of the previous guildmaster of the mage guild, but Zotis had him killed and replaced. She was attacked and blinded by the mirror shards of the Nerra, and to this day, no way was found to bring her sight back. Her little brother, Antagarik, often comes to visit her and help her out.
15- The Fire Vulture tavern. Current tavernmaster Abraham Ferabie (NE hm F5)