Myth of Bitter Immortal

There are nine continents in this world: the original continent where people become immortals, the continent where science and technology are supreme, the continent where swords and magic are given to demons, the forbidden continent where all ethics and morals are abandoned and dedicated to the development of civilization, the death continent where there are almost no living things, the pure continent where people are simple but full of mysteries, the cornerstone continent whose existence is difficult to prove, and the ethereal continent and the mad continent, which are ruled by demons. After going through countless hardships and dangers, Guan Po finally completed his tribulation in front of the Star Protector City in Enchanting Continent, transforming from an immortal cultivator into a genuine immortal. However, the war between humans and demons has begun, and the gods failed to send envoys to support humans in time. As a result, in less than a month after the war began, the northern countries of the Demonic Continent have fallen to many kingdoms. As the only existing combat force in the north that can fight against the Demon King, Guan Po must support the battle alone until support arrives...