The Mad Sea is a region within the Great Sea ocean, located to the northeast of the Eastern Coast. It was named as such after the Second Conjunction due to incomplete process of closing the gate between the worlds.
It is a quiet, misty part of the ocean. Travelers traversing its waters can sometimes see reflections of otherworldly islands, such as Malus Island. Few dare to do so however because of the Verge, which is a fog-covered border dividing the Mad Sea from the rest of the Great Sea – the border populated by sea monsters of all kinds, where the Power still resonates in unpredictable ways.[1]