The Vitr was a caustic sea of chaos on the northern border of Kurald Galain that bordered the Glimmer Fate. It resembled a sea of mercury, that was sometimes calm and mottled in appearance and other times was a raging storm that consumed the land. Air blowing off the sea stung the lungs and anything entering the water was dissolved as if in acid, including solid rock. None knew the source of the Vitr, but some believed it related to the Azathanai. The only thing certain was that the sea was gradually expanding, and the Tiste Wardens of the Outer Reach were determined to keep a watchful eye on it.