Legend has it that why don't you tell me where this task is and how to answer it?

To get the magic crystal, your gang must first have a city (such as the name of the Supreme Gang of Balizhuang), then go to the map of your city, the prime minister next to the warehouse, and take the task to the city of the sky to get a XX soul (Balizhuang's is the soul of the wolf spirit). You can take one every day, provided that your city is not captured by other gangs, and then use four crystals to synthesize seven magic crystals of the summer refiner.