The Sinking Sea is a large, landlocked, endorheic basin that is sandwiched between the territories of Uresant, Muphaev and Unknown, containing multiple islands including the Unknown. Despite acting as the drainage basin for a large number of freshwater rivers, the Sinking Sea has a strong level of salinity. Its name is derived from the peculiar lack of buoyancy that objects exhibit in its waters.
Despite the salinity of the water, it is often described as 'thin' and with a 'lack of support'. Humanoid races tend to sink quickly into the sea, and can only float on the surface with significant aid. To this end, the surrounding nations have engineered various vessels that can be used to cross the water made of lightweight material full of air pockets. As the qualities of the water are a physical anomaly, many assume that the waters were enchanted by some unknown magic.
Wars often break out across the waters of the Sinking Sea between Lucentis and Muphaev as part of disputes dating back millennia. Due to the lightweight vessels necessary for crossing the sea, any puncturing weapons that can release trapped air are deadly, and certain death awaits those who fall from their ships into the eagerly devouring waters below.