Showdown with the Demon King

After Pangu created the world and Nüwa appeared, the earth was peaceful and people lived happy, comfortable lives. But at some point, monsters and demonic beasts began pouring out from beneath the earth. They ran rampant, slaughtering civilians and turning the human world into a living hell. They split the land into three parts, known as the First Continent, the Second Continent, and the Third Continent. No one has ever seen the demonic beasts, let alone learned what they are or what they are called. They enjoy all the bounty of the land, ruling the three continents alone. They even used magic to imprison the Two Sages of Yin and Yang, the Sun Spirit Zhuzhao and the Moon Spirit Youying, on one of the continents, and turned the Four Ancient Divine Beasts into weapons at their command. There are also rumors that the two divine beings Nüwa and Pangu have vanished, apparently sealed away. The people have been driven onto an island called Earth City, also known as the First Continent. Brave warriors are urgently sought. Take up your weapons, slay the monsters, and rescue the people from their misery.