Let's come up with an amphibian race!

History. Year 1 PC (after the cataclysm): The surviving inhabitants of Tatalia descend into the dungeon and find exits to the underground sea. Years 2-10: Intensive exploration of the Sea takes place. Year 11: The first Sea Kingdom is founded. Ragar I becomes king. Year 38: Ragar I dies. A civil war breaks out. The unified kingdom splits.