Despite his towering stature Kaido moved with incredible speed, arriving in front of Luffy almost instantly, Hassaikai slammed down with a whooshing sound.
Facing Kaido once again, Luffy's spirit and energy had reached their peak. His feet were covered in dense Armament Haki, and he kicked at Hassaikai in an extremely exaggerated manner.
The air seemed to freeze for a moment, and then...
"Boom!!!"
After a deafening roar, a crater several hundred meters wide appeared in the center of Onigashima, with countless fragments of rock flying everywhere.
Luffy still couldn't stop Kaido's attack, and he was sent flying dozens of meters, his feet carving two deep craters in the ground.
Kaido stood still, but his eyes held a hint of seriousness. During the fight, he had felt an attack penetrate his arm through Hassaikai.
" Ryuo Haki! I didn't expect him to have such a trump card. Heh, but it's still too weak!"
" Kaido!!!"
Seeing Kaido's disdainful look, Luffy felt even more resentful and couldn't help but roar out.
"Whoosh whoosh whoosh!!!"
Luffy bit his finger, and his entire arm instantly swelled up, becoming several times larger than his whole body. Not only that, but a jet-black Armament Haki covered his entire arm.
" King Kong Gun!!!"
" Thunder Bagua • Di!"
Luffy into the air, and his enormous Armament Haki fist slammed down on Kaido like a house.
However, his opponent was the emperor who had dominated the New World for decades. Hassaikai pitch black and flew out with a strong Conqueror's Haki.
The enormous fist collided violently with the equally enormous Hassaikai. Luffy's attack, imbued with Ryuo Haki, could only strike Kaido's weapon, but the result only enraged him further.
The flying Hassaikai, imbued with unparalleled Conqueror's Haki, sent Luffy, restoring his arm to its original state and causing his entire body to slam to the ground several times before finally stopping.
"Hmph, it's just Ryuo Haki. You think you can defeat me? You're dreaming! What do you think the emperor of the New World is!"
"I've dominated the New World for decades. Even though I've been captured dozens of times, no one has been able to kill me. How could you, a mere kid who's only been at sea for a few years, possibly defeat me? You're far from being able to deal with me."
Kaido's words Luffy, who stared intently at Kaido.
Lin Yuan's lips twitched as he looked up from the Flame Clouds. This was only the second time he had seen Kaido so arrogant. The first time, he had almost beaten Kaido to death.
"Heh, I never expected Yamato's father to have this side to him. He's really different from Newgate and the others."
"Hmph, they only put on a smiling face in front of you. In front of others, they have the air of royalty; otherwise, they wouldn't have been able to dominate the New World for decades."
"That's true, but once I fully master Conqueror's Haki Coating, I won't be weaker than them."
Seeing Kuina's defiant attitude, Lin Yuan's face showed a hint of doting as he gently stroked her soft, long hair.
"Hmm, it should be possible, but you still have a considerable gap in physical strength. You're not lacking in attack power, but if you can't deliver a fatal blow, you'll still be in danger if this goes on for too long."
Kuina naturally knew that Lin Yuan was right, and immediately grabbed Lin Yuan's arm, asking in a sweet voice.
"Then tell me, how should I improve?"
Lin Yuan wore a strange smile as he whispered a few words in Kuina's ear, causing Kuina face to flush instantly.
"Oh dear, you're really something. Let's get down to business."
Feeling the softness in his arms, Lin Yuan laughed heartily. To make the aloof Kuina react like this made him feel a little smug.
"Haha, alright, your swordsmanship is now unparalleled, almost on par with Mihawk. Develop the More-More Fruit further; if you could enhance its power, your strength would instantly increase several times over."
"Well!"
Kuina paused for a moment. Although she had thought about these things, she had only tried them out briefly and hadn't used them many times. Compared to strengthening herself, she preferred fighting with a massive sword that was dozens of meters long.
Lin Yuan looked at Kuina with affection, then smiled and said.
"Don't worry, with your current strength, not many people can threaten your safety. I'll teach you more when we have time later."
"Um!"
Kuina smiled and nodded, her heart filled with sweetness for the man who had gone from being her teacher to being her husband.
Just as the two were talking, the battlefield below suddenly changed.
When Kaido retrieved the Hassaikai, Luffy's body suddenly changed, with strange patterns covering his entire body, and his body became exceptionally strong.
Lin Yuan understood that Luffy first used Armament Haki to arm his arm, then bit his arm and blew air into it, manipulating his fighting technique called " Muscle Balloon " to compress air into his body, giving him elasticity and a massive size.
In this state, Luffy possesses a strong, massive body and ample elasticity, even able to fly through the air using his springs. However, once he enters " Gear Fourth," he cannot stand normally and can only move by bouncing.
In Lin Yuan's perception, Luffy's strength had improved across the board, making him faster than Gear Second and stronger in Gear Third power and defense than Gear Third.
Kaido also noticed Luffy's unusual behavior. Although Luffy's aura had increased significantly, he didn't take it seriously.
"Hmph, all flash and no substance!"
No sooner had he finished speaking than Kaido stomped on the ground and then lashed out at Luffy.
" Gum-Gum Lion Bazooka!"
Luffy tucked his fists into his body, then quickly threw them out, using the rebound force and Armament Haki to slam them into Hassaikai.
The giant Hassaikai and Luffy's fist collided, but this time neither of them retreated.
Not only that, Luffy and Kaido's Conqueror's Haki were also clashing wildly, and the rain falling from the sky was dispersed by the massive aura.
" Kaido!"
Luffy roared wildly, trying to repel Kaido, but he was still outmatched in strength. Even as he crushed the stones beneath his feet, he couldn't advance any further.
"Hmph, I am Kaido, the Emperor! Get lost!"
Kaido's expression turned serious. He hadn't expected Luffy to withstand his attack. The veins on his thick arm bulged instantly, and he slammed Luffy away.
However, although he repelled Luffy this time, he did not injure him. Moreover, Luffy used the elasticity to charge at Kaido again in a strange arc.
" Gum-Gum King Kong Gun Culverin!"
"Boom!!!"
" Gum-Gum King Kong Gun!"
"Boom!!!"
At this moment, Luffy launched a frenzied attack on Kaido, using all sorts of bizarre and unusual techniques, and with the support of Gear Fourth Boundman, he managed to repel Kaido for the first time.
Kaido, who had initially been just being serious, also went berserk. This was the first time in all these years that he had been provoked by such a crazy guy.
" Thunder Bagua!"