-1399 DR to -1396 DR
The Hmur Plateau becomes overrun by a horde of koalinth and merrow, ending the peaceful merfolk Republic of Tivaan. A desperate mermaid steals the Emerald Eye of Kyron from the Dukars' Tower at Myth Nantar to drive the horde off the plateau, only to become corrupted by its power and lead the horde herself against her remaining people and the rest of Seros. »
End of the Fourth Seros War
This war destroys the Second Kingdom of Kyron, setting back koalinth population for decades. The Emerald Eye is recaptured, and the possessed mermaid is believed dead, buried in a collapsed reef on the Plains of Duna, which hereafter are called the Haunted Plains. The new merfolk community, under the auspices of the kindly Coronal Vaequiis, is the kingdom of Thalvan, led by King Darmox. »