Sea of Alvos
The sea forming the new divide between Osera and Hesperon after the central part of Halcyon experienced near-endless flooding. The Sea of Alvos is named after the Sovereign of the Mycean people who ruled during the Collapse. The sea itself is quite shallow, particularly in formerly hilly and mountainous areas, requiring deceptive amount of skill to navigate. Those now often form island chains, still named after their former peaks.