Othanzia is a country on the continent of Issylra, located northwest of Tal'Dorei on the other side of the Ozmit Sea. Othanzia is home to the capital city of Vasselheim and the Vesper Timberland, a sprawling forest. Marrowglade Loch was a swampy lake to the southwest of Vasselheim. Pyrah, the home of the Fire Ashari, is in a volcanic area of Othanzia.
Due to its high latitude, Othanzia has a significantly colder climate than most parts of Tal'Dorei. Significant snowfall and ice accumulation are part of life in Othanzia, creating harsh living conditions for most humanoids. The citizens of Vasselheim are particularly hardy, which they must be in order to survive.