Hey, I have a novel here that fits your needs-I only want to make a sea of seven martial arts with broken jade. The protagonist in the book had a piece of jade embedded in his chest. His mouth was cheap and his methods were high. He was a complete devil. At the same time, he was also a Demon Fruit user with the Bat Fruit. He did all kinds of exciting and interesting things. It was very exciting. I hope you like my recommendation.😗