Duality Master left after opening Duality World and made it open for everyone. Only one place was personally created by him, a city with the same name.

Using the same analogy of the white paper, he left a mark by a tiny corner while leaving the rest for others.

Many top cultivators chose to stay in Duality City, turning it into the largest city in this region. Later on, average cultivators visited as well.

The majority of cultivators lacked the qualification and power to open their own grotto in...