The affairs of Eberron’s surface dwellers are well known and well documented, but very little is known or recorded about the intelligent life that thrives beneath Eberron’s seas. Anyone who’s travelled by sea from Khorvaire to Xen’drik has likely dealt with the Sahuagin, but very few know about the vast underwater society of which they are but a small part. Beneath Eberron’s seas lie vast civilizations as complex and filled with as much intrigue as the cities of the surface world the largest and most cosmopolitan of which is Madidus.
Madidus is the undersea equivalent of Sharn. All intelligent aquatic races live, play and do business here. It’s the centre of underwater commerce. Much like Sharn, Madidus was built around a manifest zone. Where Sharn’s connection to the plane of Syrania allows building to reach heights that seem impossible, Madidus is connected to the plane of air which crates permanent pockets of breathable air. This allows surface dwellers to live in Madidus comfortably. The area of the city enveloped with breathable air is home to hundreds of people from the surface including Humans, Elves, Dwarves and Halflings. Few who end up here make any effort to leave.
The existence of Madidus is known only to select few surface dwellers. Many members of House Lyrandar are aware of the city’s existence. Captains travelling the waves above Madidus with any regularity are informed of its existence so that they can pay appropriate tribute and take advantage of possible trading opportunities.
The Daughters of Sora Kell along with a many of Droam’s populace are aware that a vast underwater civilization exists if not the specific details of where such cities are located. Representatives from Madidus have even sent diplomats to Droam asking for the monstrous nation’s assistance in facilitating introductions with the leaders of the other surface nations.
Madidus may be unknown to most surface dwellers but it is a very welcoming place once discovered. Many adventurers have come to the city in the past decade. Some have sought Madidus out for no other reason than to prove its existence. Others find the idea of interacting with such a foreign culture exhilarating. Some seek to leave behind their past and begin anew in a place where their problems will never catch up to them.
- We’re on a diplomatic mission
A contingent of diplomats from one of the surface nations which includes the PC and a team of Warforged bodyguards accept an invitation to visit Madidus. While touring the section of the city overlapping the manifest zone one of the dignitaries recognized some of the city’s inhabitants as deserters. During the war those fleeing the violence and carnage managed get to Madidus. Here they found a safe haven away from scrutiny or punishment undersea. Although presumed dead, many of Madidus’s residents are still wanted criminals. Should their existence and whereabouts become common knowledge, the leaders of Madidus will have a diplomatic nightmare on their hands and they can forget any peaceful relationship with the surface worlds.
- The missing undersea vessel
Members of House Cannith and House Orion have created new vessels capable of traveling underwater. While they continue testing the vessels’ capabilities they strive to keep its existence a secret, especially from House Lyrandar. With a fleet of five working vessels, they are almost ready to announce their latest venture to the world and give House Lyrandar some real competition. Unfortunately one of the vessels has disappeared. It was on a survey mission, mapping the undersea floor and was supposed to return to port days ago. Some fear that the vessel might have been attacked; others believe that House Lyrandar is somehow involved. The PCs are asked to join the rescue mission and accompany they search party just in case hey run into any trouble. During the third day of searching for the missing vessel the search party discovered the underwater city of Madidus. What is this place? Could this be where the missing vessel ended up?
- Trapped inside a sinking ship
Following a battle that doomed their ship, the PCs find themselves trapped in the hull as their vessel sinks. Superior craftsmanship has kept the hull intact, trapping enough air within for the heroes to survive in the short term. However, if a rescue is not forthcoming the PCs may end up in a watery grave. Shortly after the ship touches down on the seafloor the PCs are beset upon by Sahuagin. However, these normally aggressive and dangerous sea creatures explain that they were sent from the undersea city of Madidus to rescue the PCs. Can the PCs trust them? Do they have any other choices?
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