Sunken Journal from Sudds, a Mystery of the Shrine of Tribute.
War was declared. Battle lines drawn, Sea Queen on one side, Ancients and merfolk on the other. The Queen swelled her army, with minions that could take her war to the land-dwellers. People once, changed inside the singing stone. Ocean Crawlers ever after, different types? Not sure, needs more research. Merfolk too? Attacked to swell her Siren ranks; a single scratch could doom them. Nowhere was safe, on land or sea.