As a disciple of the Alchemy Sect, Duan Yun wasn't able to stay idle after settling down in the Light Wind Empire's Capital. As such, he looked for a place and opened up a store to sell elixirs. As an Alchemist who possessed an alchemic flame, his talent in alchemy could be considered among the best within the Alchemy Sect.
The purpose of him opening the store was to earn some crystals. Being an Alchemist was a profession which burned money. The crystals he had on him weren't many in the first place.
Not to mention the fact that the prices of the food from the black-hearted store were extremely high. If he didn't have crystals, he wouldn't be able to afford the food there. That was the main reason he opened the store.
He had to open a store just to earn enough crystals for a meal… He was probably the most miserable Alchemist in the world.
Now, he discovered a terrifying and frightening matter.