The reason Qing Mo Immortal City could become one of the top ten immortal city of Zong Piao heaven was not because it was big nor popular but because of blue lightning mountain.
It was just a mountain but no one could go in usually. Only when the Blue Lightning Immortal Well was open would the city open teleportation formation to the mountain. The Blue Lightning Immortal Well was only an ordinary top grade immortal but its quality was very good. It was much better than other things for cultivation and breakthroughs.
The only pity was that it only opened every thousand years and only invited 100 people in each time.
Many immortals went to where demonic immortal spirit beasts were gathered and slaughtered them just for a chance to cultivate in the well.