Pirate: I Trained the Three Luffy Brothers into Generals

Traveling through the world of pirates, Kahn became an orphan adopted by the Dadan family and awakened [conceptual body]! If you don't eat Devil Fruit, you won't practice Haki. You become stronger by breathing, and you become absolutely immune to being beaten and reverse-evolve! In order to be able to sleep peacefully in the future, Kahn focused on the newly sent Ace, Sabo and Luffy, and started hell-level special training. Tie Luffy to a rocket to practice ductility, throw Ace into a volcano crater to practice heat resistance... A few years later, Garp returned to the East China Sea to test the results of his cultivation. Looking at Ace smashing the meteorite with one punch, Sabo tearing apart the pacifist with his hands, and Luffy turning on the fifth gear of his muscles to chase and beat up the Neptune type, Garp said his heart was completely broken: "You call this special life-saving training for children?!" Until the war breaks out. Facing the monster brothers with the fighting power of the three generals, Sengoku and the three generals fell into deep despair. Just when the navy was about to use the King of Heaven to die together, the sky split. Kahn yawned and fell from the sky. He slapped Akainu's magma with one slap and split Marinevando into two with his backhand. He said helplessly: "I just want to be a salty fish, why do you have to bully my brother and force me to do something?" At this moment, the whole sea went crazy: above Luffy, there was a more terrifying monster brother?