Demon World

As the long knife was unsheathed, the dark world seemed to be divided into two. With a cry, the night faded, revealing the blue sky. A black dragon fell from the sky. A long wound on the dragon's chest was seen spouting blood. The dragon slayer put away the long knife, dug out the magic crystal in the dragon's heart, and put it into his pocket with a smile on his face. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.