Chronicles of Embyur
Wyvern’s Lake is home to many species of fish. While swimming in the lake is not suggested, catching and eating fish from it is completely safe. Swimming in the lake causes nightmares, and the closer you swim to the lone island in the middle, the worse the nightmares are.
The water is constantly a dark murky grayish/black, and sometimes terrible wind storms will start up out of nowhere and create hurricane like conditions, always centered on that lone island.
One fisherman, who was brave enough to go near the island, claims to have seen strange hooded people coming in and out of the ruins that dot the island.