The demons inside Oblivion Border have been behaving abnormally.
The Winterstrait Fishmen in the west seem to be searching for something incessantly, but I've no idea what.
Please defeat the Fishmen and find out their purpose. You can find out about their plans from the Winterstrait Fishman Priest.
The Fishmen reside mostly in the center of the Winterstrait Island in the west.