Purple Jade Nine Dao Tree

Once upon a time, Azure Rain City had actually been an uninhibited mountain range.

However, at some point in time, the four major clans had decided to settle in this place. After countless years of development, this place had finally become a holy land for alchemy that attracted countless alchemists from all corners of the world.

As for the specific reason, it was because the entrance to the Medicine King's Cave lay in this piece of land. Moreover, it was in order to hide the Treasure Forest Pavilion's true foundation that Azure Rain City was built. Who could imagine that there existed the entrance to an ancient mystery realm under this city?

Ling Han and Zhang Feng were both asked to vow to never reveal the secret of the Medicine King's Cave to others. Otherwise, they wouldn't be allowed to enter.