Pirate: I Can Sacrifice Devil Fruits

(For a new author, I have failed to write the previous one. You can start reading from the second volume without affecting the overall plot.) Traveling through the world of pirates, you will see an iron cage when you open your eyes. Opposite him stood the Hammer Fighting Slave, and the stands were filled with scumbags who were obsessed with gambling. System activation, choose one of four. There is no time to hesitate and choose equipment. The steel of the heart entered the body, the bones exploded, and the muscles were torn and recast. Fight all the way from the iron cage to the end of the world. System prompt: Those who kill those with abilities can be sacrificed and receive random rewards. Not a capable person? Kill in vain. From then on, his rules were simple: take away the person who deserves to be killed with one punch. The Navy uniform is just a legal license to kill. When the iron fist smashed through the chest of the four emperors, when the overlord's color clashed with the red hair, when the dragon man knelt in the ruins and asked "Who are you?" He said: "I'm just a marine. The kind who specializes in killing animals."