World Fraction

World Fraction is a global-level magic that alters Elder Tale. According to Ri Gan, it happened three times in the history:
 * The first World Fraction happened 300 years ago when the six scrapped princesses were about to be killed. After this event, demihumans including Goblin, Kobold, Orc, Troll, Gnoll, Lizard, Sahuagin, and Lizardman appeared.
 * The second World Fraction happened 60 years after the first one. After this event, Adventurers appeared.
 * The third World Fraction happened in May. Adventurers called it the Apocalypse. Players noticed that the People of the Land suddenly has their own personalities and stories.