Let's come up with an amphibian race!

That cataclysm, as a result of which Enroth perished (when Gelu and Kilgor fought)
45th year. During one of the expeditions into the depths of the sea, scouts encounter Something.
49th year. During the internecine conflict, the last direct descendant of Raghar dies. The turmoil intensifies.
53rd year. A representative of one of the side branches of the ruling family declares himself King Raghar II. He is not recognized by the others.