Overview of the worldBefore the very first Master of the Nine Tribulations Sword, a man was responsible for the current state of the Nine Heavens Continent. The Nine Heavens Continent was originally a single piece of land. That man used the Nine Tribulations Sword to reform the Nine Heavens Continent, separating it into nine equal layers (each race occupying their respective layer, with the Human race at the very top). However, those nine equal layers turned out to be unstable, resulting in the collapse of the top eight layers, crushing a huge portion of living creatures beneath them (also causing some races to disappear from the Nine Heavens Continent). Since Humans mostly resided top layer, they therefore became the most common living species on the Nine Heavens Continent.