Rhashaak was once an ancient black dragon of a noble line, brought to Haka’torvhak to guard the fiendish power trapped in the ruins. Although he remains bound to that duty, he has been tainted by his task. Today, dragon magic keeps the presence beneath the volcano quiet, but Haka’torvhak is home to lesser fiends that are subject to Rhashaak’s will.
In the Age of Demons, Haka’torvhak was a great bastion of the fiends, and the site of a major battle with the couatls and dragons. The dragons bound great fiends beneath the volcano and established a line of dragons as their guardians. Appearing much as it did millennia ago, ancient Haka’torvhak is rumored to contain treasures from the earliest days of Eberron.
For generations, the Poison Dusk kobolds have worshiped the dragon Rhashaak as a deity. The kobolds swarm into Haka’torvhak at regular intervals for ceremonies, but only priests, honored warriors, and living sacrifices are allowed to see the god-dragon. A small number of dragonborn and lizardfolk clans have adopted the Poison Dusk faith.
Through the worship of his disciples, Rhashaak hopes one day to ascend to godhood.
Source: Explorer's Handbook
Guardian of the cursed city of Haka’torvhak, the black greatwyrm Rhashaak lives deep in the jungles of Q’barra on the world of Eberron, where he is worshiped as the incarnation of a god by numerous kobolds, dragonborn, and lizardfolk. Rhashaak has existed for millennia as the primary guardian of the imprisoned Fiend Masvirik, who once held dominion over reptilian creatures.
Over time, Rhashaak has been tainted by the corruption he guards and has slowly succumbed to its evil. Powerful wards keep Rhashaak bound to his fallen city, but his legions would pose a significant threat if Rhashaak were ever roused by settlers or explorers searching his ruins.
Source: Fizban's Treasury of Dragons
This port city is the only legal point of entry for foreigners who wish to enter the Empire of Riedra. All travelers remain confined in the foreign quarter. Merchants from across Khorvaire trade for exotic Riedran goods, while envoys from many nations negotiate with the emissaries of the Inspired. To enter Riedra proper, travelers must obtain a transit visa from the Iron Gate, the office of foreign relations. The office grants few such visas; visitors must make a compelling case for entry or find a secret way to evade the watchful eyes of the Iron Gate.
This massive metropolis extends for miles along the eastern coast of Riedra on the Barren Sea. The city contains six huge districts. These districts would be five perfect circles centered on the city’s inner fortress, but the outermost circle is broken in half where it meets the coast. Therein lies Dar Jin’s foreign quarter (the Jhodra), foreign harbor (Harbor of Tranquility), and a harbor for Riedran ships and business only (Harbor of Tureya).
Dar Jin is Riedra’s biggest and best-known port. Here, ships come from Riedran holdings in Xen’drik and from Khorvaire. Travelers who have business in Riedra come to Dar Jin first, and few need to go farther. Foreigners aren’t allowed to leave the foreign quarter without permission and proper papers, and most have no need to do so, since the dragon marked houses’ outposts provide all the comforts of Khorvairian civilization. A large contingent of Riedran soldiers maintains a highly visible presence in the city and keeps the peace. Criminal activity usually results in deportation or execution.
Dar Jin rises up from the waters of the Barren Sea, and stretches along the coast. The city's massive walls are smooth red stone with wide lines of blue crystal are embedded in the surface—these labyrinthine patterns glow with an inner light. The towers that rise up above are whorled and rounded, and seem to have been blown from colored glass.
Dar Jin is the greatest port of Riedra. It is the terminus of the Xen'drik trade route, and much of the industry of the city is devoted to processing the goods from that land. Trade goods are organized and stored in preparation for transport across the nation, and crystal foundries transform shards into crysteel and other useful forms.
The walls of the city extend for miles, and the slender towers stretch hundreds of feet into the air. The harbor is filled with ships, and the docks are thronged with people. But the people of Dar Jin go about their business silently, speaking only when it is absolutely necessary.
Throughout the history of Riedra, all trade has been conducted on foreign soil. In 1300 Unity (998 YK), that curtain was lifted. Today, merchants can petition Inspired ambassadors for the right to dock in the harbor of Dar Jin.
Leadership: Lady Tureya (LE female usvapna Inspired telepath 15) is the Eidolon of Dar Jin. Thousands of lesser Inspired and Chosen labor beneath her.
Demographics: 94% humans, 2% Chosen/Inspired, 1% ogres, 3% others (changelings, dwarves, elves, gnomes, half-elves, half-orcs, halflings, ogre mages, shifters, skulks).
Economics: 25,000 gp purchase limit; no asset limit. Larger transactions could be arranged in time for the purpose of international trade, but expensive single items are rarely found here.