I Made up My Own System at the Beginning

Ever since Yun Xian was hit by a stone in the head, a ball of light appeared in his head. Xuan Feng thought it was a golden finger, which made him extremely excited at the time. However, a month has passed, and Yun Xian has not discovered the correct use of this light ball. It wasn't until one time that he accidentally entered the code he made that Yun Xian finally discovered the usefulness of this thing. You can actually make up your own cheat code!