Night Exercise

This story is purely fictional. In the parallel world of Tang State, there is a group of people. They travel in all walks of life, and there is another face hidden under the daily mask. During the day, you can see shadows but not light. See light at night, but not form. They are the sharp edges hidden in the dark. Once it hears the call, it turns into a ruthless killing weapon, destroying the darkness and guarding peace. They are the legendary night warriors".