Indeed, the Buddha Thearch, the Night Empress, the Yin Thearch, and the Xuan Thearch were not in the Umbra Continent; they had gone to the Black Sea north of the continent. At this moment, they were trapped inside a mystic realm.
North of the Umbra Continent, the Pegasus Continent, and the Beastmen Continent was a sea region that was even bigger than the Blood Night Fearsome Sea. It was named the Black Sea as the water there was black.
The Black Sea had many powerful demons and many sea islands. However, the sea demons there were all very poisonous and had strong attack abilities. The seawater itself was poisonous. Hence, though people were living on some sea islands before, they had all been forced to evacuate. The Black Sea had since become the playground for the sea demons; hardly any humans went there.