[Chapter Size: 1700 Words.]
Third Person POVJaya, First Half of Grandline.
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The tension was heavy in the atmosphere of that street, all the outlaws of Jaya had never managed to emit any sound while Luffy stared down Jack after using such words. His gaze, previously calm and confident, now shone with fierce determination.
"Are we finally going to fight?" Enel asked calmly at his side, already accustomed to Luffy being eccentric.
"Yes, we're going to fight." Luffy commented, not a full day had passed and he had already faced a navy admiral, a holy knight, and now was ready to take on a Yonkou commander and one of the strongest Shichibukai.
Keeping his head directly facing Jack and Doflamingo, Luffy began to transform. It wasn't just a physical change, but an alteration in the very atmosphere around him as his flames manifested.
The purple flames, previously just sparks around his body, now erupted into a vortex, enveloping him completely. The energy was emanated by Luffy, as he entered Phase 2 of his Akuma no Mi, his figure becoming more muscular and with his skin in a purple hue, his two horns with his scarlet eye giving him a dangerous aspect to anyone there with his more dominating aura.
Jack watched with a mix of surprise and reluctant admiration. "So this is your Zoan, Kaido still wants you very much in his ranks, boy, don't mock luck, you're just a rookie." Jack stared at Luffy's transformation with interest, but he was not known as someone who could hold back in a fight.
"Then, let's see if you can live up to your fame, Mugiwara," Doflamingo taunted, his threads already dancing around him in anticipation.
Jack stomped on the ground forcefully, as the ground began to crack he bent his knees to make the first move. Luffy, now completely transformed, faced his opponents with a defiant smile. "Let's get straight to the point, let's begin," he said, his voice distorted by the transformation.
The next moment, Luffy advanced, the purple flames leaving a trail of light and heat in the air. Enel, at his side, prepared to join the battle, the air charged with electricity.
Seeing Luffy approaching, Jack wasted no time and lunged against the half-billion pirate, believing he would easily handle this rookie, but he didn't count on Luffy advancing activating his Moa Moa no Mi sixty times. The counterattack was instant and overwhelming; Luffy launched a punch loaded with power and fire directly at Jack with an explosion that only Jack managed to notice at the last moment with his Haki.
The impact was catastrophic. Jack, caught by Luffy's fiery fist, was launched like a meteor, the force of the blow catapulting him through buildings and structures as a projectile. Every house in Jack's path was reduced to rubble, a line of destruction marking his uncontrollable flight until he finally collided with a distant mountain and out of the city, the force of the impact echoing like thunder, raising a cloud of dust and debris, while the entire island felt it.
Chaos ensued instantly among the spectators. The crowd, which until then had watched the battle with a mix of fear and expectation, panicked, seeking refuge from the unleashed destruction. Screams and exclamations of shock filled the air, as everyone tried to process the magnitude of the power of the beings in front of them.
"What is this?!"
"We can't stay here!"
"The island is going to be destroyed!"
"Is this the power of New World pirates? This is absurd!"
"We are just ants, let's leave the island before we get caught in the fight."

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One Piece - I Am A Different Luffy! BOOK1!
FanfictionChosen to transmigrate as Luffy (OC) for the first episode of the work with wishes OP. I always wondered how Luffy's adventure would be with the most powerful and serious character, so I created this story. The story may start off nonsensical, but I...