The world is vast and divided into countless continents. It had been ruled by demons for thousands of years, and all life was in ruins. Later, humans and geniuses of various races rose up, took back pieces of land from the demons, and established countless small countries.
In order to unite against the demons, the whole world has reached a consensus: all fifteen-year-old children who have awakened their powers must go to an isolated island to survive for seven days.
Those who pass the assessment will go to the demon-occupied area, go deep layer by layer, kill the demon leaders, and take back the land. After taking back the land, you can choose to stay and become king, or you can choose to continue the war.
Purpose: World peace