The secluded workshop on the outskirts of Foosha Village had become the center of Alex Mercer's world. Here, hidden away from prying eyes, he devoted himself to a dual pursuit: building the ultimate pirate ship and transforming Luffy's body and abilities into something far beyond what the original Luffy had ever imagined. But this journey was anything but easy. It was filled with grueling challenges, moments of frustration, and the constant need to push the boundaries of what was possible.
Training with Haki proved to be one of the most difficult aspects of Alex's new life. Haki was a mysterious power, requiring intense focus and discipline to master. Alex had knowledge of it from his previous life, but knowing about it and actually being able to use it were two very different things.
Observation Haki came first. Alex began by honing his senses, trying to feel the presence of others without relying on sight or sound. He spent hours sitting in the forest, eyes closed, listening to the rustling of leaves, the distant calls of animals, and the subtle shifts in the air. It was exhausting work, and progress was slow. Days would go by without any noticeable improvement, leaving Alex frustrated and questioning whether he was on the right path.
But then, there were moments—fleeting, but undeniable—where Alex could feel something. A flicker of awareness, a sense of presence just beyond his reach. It was these moments that kept him going, pushing him to dig deeper, to keep training even when it felt like he was making no progress at all.
Armament Haki was even more challenging. Alex knew that this type of Haki required both mental and physical strength, a way to harden his body or objects with invisible armor. He practiced by trying to coat his fists with Haki, focusing all his willpower into a single strike. But no matter how hard he tried, his punches felt the same—strong, but lacking the extra power that Haki was supposed to provide.
The failure was frustrating, but Alex refused to give up. He pushed Luffy's body to its limits, enduring the strain and pain that came with intense physical training. He lifted weights, ran long distances, and sparred with makeshift dummies, all while trying to channel Haki into his attacks. There were days when he could barely stand, his muscles aching from the effort, but he knew that this was the only way to grow stronger.
At the same time, Alex began to experiment with Luffy's Gum-Gum Fruit abilities. The rubbery nature of Luffy's body offered a unique set of possibilities, but it also came with its own set of challenges. Alex knew from the original story that Luffy could stretch his limbs and absorb impacts, but he wanted to push these abilities further.
He started by refining the basic techniques—stretches, punches, and kicks that could reach enemies from a distance. But soon, Alex realized that the real potential lay in combining these techniques with Haki. If he could harden his rubber body with Armament Haki, he could turn Luffy's limbs into powerful weapons, capable of delivering devastating blows.
But this was easier said than done. The combination of Haki and rubber was tricky, requiring precise control and timing. Alex spent countless hours practicing, trying to channel Haki into his stretched limbs without losing the flexibility that made Luffy's attacks so effective. It was a delicate balance, one that took weeks of trial and error to even begin to master.
There were many failures. His limbs would sometimes snap back painfully when he lost focus, or the Haki would dissipate just as he was about to strike. But with each failure, Alex learned something new, gradually improving his technique until he could deliver a punch that was both powerful and elastic, capable of inflicting serious damage.
Meanwhile, the work on the ship continued. The creation of the alloy had been a major breakthrough, but there was still much to do. Alex began to focus on the ship's weaponry, drawing on his knowledge from his previous life to innovate beyond the traditional cannons used in the One Piece world.
Alex knew that the round cannonballs commonly used by pirates were effective, but they lacked the destructive power that modern artillery could provide. In his old world, he had studied the basics of military technology, including the use of high-explosive (HE) rounds—shells designed to explode on impact, causing maximum damage to enemy ships and fortifications.
He decided to adapt this concept to his ship's cannons. Instead of relying on solid shot, Alex began to experiment with creating explosive shells. This was no easy task, especially with the limited resources available to him. He had to start from scratch, creating gunpowder from raw materials and designing a casing that could withstand the pressure of being fired from a cannon while still detonating on impact.
The process was painstaking. Alex spent days researching, gathering materials, and testing different designs. There were many failures—shells that exploded too early, or not at all. But each failure brought him closer to success. He kept meticulous notes, refining his designs based on what worked and what didn't.
Kob, the old inventor, was a valuable sounding board during this time. Though he lacked Alex's knowledge of modern technology, he had a deep understanding of the basic principles of engineering and metallurgy. Together, they brainstormed ways to improve the design of the shells, finding solutions to the problems that arose.
Finally, after weeks of work, Alex successfully created a prototype HE round. It was a small shell, about the size of a grapefruit, with a fuse that would ignite on impact. He tested it in a makeshift firing range he had set up near the workshop, using one of the smaller cannons he had salvaged from a wrecked ship.
The first test was a success. The shell fired cleanly from the cannon, arcing through the air before slamming into a target of stacked rocks. There was a moment of silence, and then a powerful explosion rocked the area, sending debris flying and leaving a smoldering crater where the target had been.
Alex couldn't help but grin, feeling a rush of satisfaction. This was a game-changer—a weapon that could give him a serious advantage in battle. But he knew that this was just the beginning. He needed to refine the design, create more shells, and integrate them into the ship's weaponry in a way that maximized their effectiveness.
The ship's design itself was evolving alongside these innovations. The destroyer Alex envisioned was taking shape, a vessel that combined the sleek, streamlined design of modern warships with the unique characteristics of the One Piece world. He planned for it to be fast and maneuverable, with a reinforced hull made from his alloy, capable of withstanding both conventional attacks and the harsh conditions of the Grand Line.
Alex also wanted the ship to have the versatility of a pirate vessel. The deck would be equipped with multiple cannons, each capable of firing both traditional cannonballs and his new HE rounds. The ship's bow would be reinforced, designed to ram enemy vessels if necessary. He even planned for a retractable keel, inspired by the Going Merry's ability to traverse shallow waters, allowing his ship to navigate dangerous areas that other ships couldn't reach.
As the weeks turned into months, the combination of intense physical training, Haki practice, and shipbuilding began to take its toll on Alex. There were days when he felt utterly exhausted, his muscles aching, his mind clouded with fatigue. But he refused to slow down. He knew that every moment he spent pushing himself was another step closer to his goal.
There were setbacks. The Haki training continued to be a struggle, with progress coming in frustratingly small increments. The ship's construction was slow, hampered by the need to keep everything hidden from the villagers and the difficulty of sourcing materials. And the explosive rounds, while promising, still had a long way to go before they were reliable enough for combat.
But there were also victories. Small, hard-earned successes that fueled Alex's determination. Each time he managed to successfully channel Haki into an attack, each time he forged a new piece of the ship's hull, each time he tested an explosive round and saw it work—it was a reminder that he was moving forward, turning his vision into reality.
Kob noticed the toll the work was taking on Alex, and one evening, as the two of them sat by the fire, he spoke up. "You're pushing yourself hard, Luffy—harder than anyone I've seen. Maybe too hard. I know you've got big dreams, but don't forget to take care of yourself. You can't become the Pirate King if you burn out before you even set sail."
Alex nodded, appreciating Kob's concern but knowing that he couldn't afford to slow down. "I know, Kob. But there's so much at stake. I need to be ready, and I need the ship to be ready. The world out there is dangerous, and I can't take any chances."
Kob sighed, leaning back and staring into the flames. "Just remember that you're not alone in this. Even the strongest ship needs a crew to sail it, and even the toughest pirate needs allies. Don't let yourself get so caught up in your work that you forget what really matters."
His words stayed with Alex as he continued his work. He knew Kob was right. As important as the ship and his training were, they were only part of the equation. Alex would need a crew—strong, reliable people who could help him navigate the challenges ahead.
But for now, his focus remained on the ship and his training. The destroyer was taking shape, both in his mind and in the hidden dry dock. It was still far from complete, but the progress he had made was undeniable. The alloy was strong, the design was sound, and the weaponry was becoming more formidable with each passing day.
As Alex stood in the dry dock one evening, looking over the skeletal frame of the ship that would one day carry him to the ends of the world, he felt a surge of determination. The journey was far from over, but he was closer than ever to setting sail. And when he did, Alex knew that he would be ready—ready to face whatever the Grand Line had in store, ready to fight for his dream of becoming the Pirate King.
But first, there was still much to do. The ship needed to be completed, the Haki needed to be mastered, and the explosive rounds needed to be perfected. The path ahead was long and fraught with challenges, but Alex was prepared to face them, one step at a time.