The Bitter Sea, formally known as the Crystal Sea, is a body of water east of Nehekhara, north-east of Lybaras, and south from the Plain of Bones. To the north-west, it is connected by the Straits of Nagash to the polluted Sour Sea. The sea most likely got its name from the polluted waters high up in the World's Edge Mountains, where the Sour Sea is located, its waters being polluted by huge amounts of Warpstone, as well as the pollutants caused by the River Ruin up by the Sea of Dread.[1a]
