Alluvia (Ah-loo-vee-ah)

The delta of the Klove River has long been inhabited, as the flood plains fertile grounds provide a microcosm of life-sustaining vegetation amongst the harsh environments of the sprawling desert and vast ocean it is pinched between.
Humanity first came to settle the area in the twilight years of the Antecean Empire. Off the back of their second great civil war, prisons in the Requiem region were overflowing. The Anteceans opted to exile most of these petty criminals and war prisoners, throwing them down the Klove and letting fate decide the outcome. What these exiles found was a small settlement of bizarre, fish-like humanoids: Kuo-Toa.
The Kuo-Toa, who had already lived here for centuries after escaping the Underdark and adapting to life on the surface, believed these early arrivals of humans to be gods, and with their bizarre abilities to "conjure" their own deities, they --sort of-- became them. However, the process warped them into a more fish-like form, which after years of the humans and fish-men assimilating, led to the combined cultures' worship of "nature spirits" that wander the flood plains.
Ever since, the two species have lived more or less harmoniously, though the kuo-toa have taken a subservient role to the humans, though the latter's culture has been heavily influenced by the kuo-toa. Currently, the city's leader is referred to as "the Anointed" as is chosen in a ceremony where the nature spirits (specifically the giant salmon that represent the city's founders) are summoned to select one of many candidates vying for the throne.
Now, Alluvia is renowned as a great trading partner for their spices and fruits unique to the delta, most notably glimmerfruit, an apple-sized, husked fruit with long, silvery seeds that shimmer in the light. Another standout of the city is its mastery of glasswork. Baubles and glass sculptures adorn much of the city, and with the lack of any nearby sources of iron, Alluvian arcanists have found ways to reinforce glass to be functional as weaponry. These "fireglass" weapons are honed to a deadly edge and are as durable, if not more so, than normal steel. As a result, and due to the magical techniques necessary to forge them, they are usually at least considered +1 weapons.
Alluvia is also the only human-majority city that the dwarves of Kal Kadre are willing to trade with. They have an outpost about halfway between the two cities in which the humans of Alluvia come beneath the earth to trade with the dwarves, though there are rumors that the last trade caravan to head out that way found the outpost closed down.
Conflicting Origin Stories The general story among the humans is that Alluvia as it is known today was founded over a millennia ago by a pair of brothers who were cast into the Klove and woke up days later on the fertile banks of the delta. They built a glorious paradise for themselves, but as more people travelled down the river, they too wished to join the paradise. Eventually it grew to the city it is today.
The kuo-toa, on the other hand, tell a story of how one day, the river delta dried up for a time due to an extreme drought. The migrating salmon became trapped in a pool of water and were unable to reach the ocean or backtrack up the river. So a brave pair of salmon mustered those that would follow and decided to strike out on land, learning how to survive the dry air, mastered the ways of magic, and created an oasis where before there was naught but desert.
Layout and Aesthetic The city's infrastructure is made largely from sandstone and formed from into simple shapes; mostly standard blocks and pyramids. While the flood plains have small forests, wood is not in enough abundance to be used as a building material.
The city is arranged in blocks raised up on the hills broken up by the waters of the delta, with each block interconnected by arched bridges, many of which are adorned with glass statues of various "gods". While glass cannot be produced in large enough quantities to use as building materials, almost all buildings are adorned with glass and windows to some degree, much of which is colored in vibrant patterns. Glass sculptures, statues, and ornamentation are common as well; the most notable of which is the Twins' Looking Glass: a massive, intricately designed, water-filled glass tank connected to the delta which, when they see fit, is visited by the Rose Twins, the supposedly reincarnated, godly forms of the twins who founded the city.
Governance. The city is governed by the Anointed, who is selected after the previous Anointed retires or passes away in a ceremony in which the Rose Twins are summoned to select one of several candidates. Aside from their unique selection process, the Anointed works synonymously as a monarch would: they have final say on all administration decisions but tend to defer to a circle of handpicked advisors, though not every Anointed does this. Currently, there have been 58 Anointed, spanning back at least 1000 years.
Pantheon. The current list of "nature spirits" acknowledged by Alluvia has nearly 6 dozen entities, but the following are the most important:

• The Rose Twins: two giant salmon that represent the founders of the city, believed to exert their will through their Anointed
• The Golden Wanderer: a camel said to have radiant, golden fur. When it appears, it is said to bring a bountiful harvest season and plentiful waters
• The Sunset Behemoth: a megursa (an elephant sized, tusked bear-like creature) with deep red fur. Occasionally spotted in the delta waters. Is said to reveal hidden machinations or conspiracy when it appears.
• The Silver Serpent: a pericol lizard (the large, reptilian creatures that frequent the desert) with iridescent silver scales. Portends an extended drought or military conflict.
• Heterochromatic Cats: not a specific entity, but rather any cat with two different colored eyes is said to be a part of a greater whole that watches over the city. Finding one or owning one is said to be a favor of good fortune.
• The White Feather: an albino-colored eagle or hawk. When seen in the sky, it portends a new arrival in the city or possibly a change in direction for the people.
• The Crab: a giant, oversized crustacean said to occasionally appear in the estuaries. Generally believed to be an ill-omen, though there are no agreed upon specifics of what that means.

There are no dedicated temples or churches to these spirits, and worship is not handled in the same way as other religions. Statues are made in their image, though these are generally exercises in art rather than reverence. Instead, people make offerings and tributes in ways to entice the spirits to appear and grace them.