Sea monster

As she spoke, Haku stretched out her finger and released High-Voltage Electricity powerful enough to electrocute an adult, which was then directed at Luffy!

Luffy stood there unharmed, grinning with his signature smile, and said smugly, "Haha, I'm Rubber Human, electricity has no effect on me!"

Haku nodded and smiled at Nami, saying, "This is the weakness of the Rumble-Rumble Fruit; you need to remember that. Despite your immense strength, your attacks will be ineffective against rubber or other insulators. Therefore, in the Future, you'll need to use your abilities flexibly and always be aware of your enemies' characteristics."

Nami nodded seriously. She not only needed to master the power of the Rumble-Rumble Fruit, but also learn how to use it better.

To demonstrate some applications of the Rumble-Rumble Fruit, Haku used the Door-Door Fruit to open a Space Door in front of him!

Without further explanation, he conjured a miniature Thunder Dragon and tossed it into the interior of the door!

As the miniature Thunder Dragon disappeared into the Space Door, everyone held their breath, anticipating what would happen next. Haku smiled slightly, as if she had already foreseen the outcome.

A few seconds later, a deafening explosion came from the other side of the Space Door. A powerful shockwave, mixed with sparks, erupted from inside the portal, but was blocked by an invisible barrier and returned to the Space Door opened by the Door-Door Fruit!

Nami tried to conjure a Thunder Dragon in front of her.

Unfortunately, she failed, mainly because she was too eager to shape the lightning on her body.

As a result, before the unformed Thunder Dragon could go out of control, it was intercepted by Haku and thrown into the space opened by the Door-Door Fruit!

In the time that followed, Haku and Nami underwent more in-depth training together. Haku not only taught Nami how to control the power of lightning, but also how to sense and predict the enemy's movements, so as to better utilize the Rumble-Rumble Fruit for attack and defense.

Under Haku's guidance, Nami's strength improved rapidly. She not only became adept at unleashing powerful electric currents for attacks, but also enhanced the range of her Observation Haki through Electric Waves, and even learned to use lightning for Teleportation.

This young Navigator's learning talent amazed even Haku!

Especially after Nami fully mastered the Rumble-Rumble Fruit, she became even more suited to using Rumble-Rumble Fruit abilities.

The Thousand Sunny's diving speed is still quite fast!

Basically, after Nami absorbed all the knowledge about the Rumble-Rumble Fruit from Haku's mind, the Thousand Sunny had already reached near the seabed by diving with the ocean current!

All that's left is to use the Log Pose to get to Fish-Man Island!

The closer you get to the seabed, the more dangerous the creatures you'll find.

For example, a Sea Monster many times larger than the Thousand Sunny is slowly approaching!

Haku didn't warn of the impending danger!

He quickly noticed that Nami seemed to have noticed something; her brows were furrowed, and her eyes flashed with vigilance.

"Nami, can you feel it?" Haku asked softly.

Nami nodded, a hint of nervousness in her voice. "Yes, a very strong aura is approaching us, and... it's enormous."

Haku nodded; in his opinion, Nami's combination with the Rumble-Rumble Fruit's power was quite good.

Luffy, Zoro, Sanji, and the others also sensed this unusual atmosphere and gathered at the bow of the ship. They stared at the unfathomable water ahead, their hearts filled with vigilance.

"What is that?" Luffy asked curiously.

Haku said with great interest, "It's a huge Sea Monster, and it's approaching us."

"Sea Monster?" Luffy stared intently into the distance, waiting for the Sea Monster to appear.

When a Giant Octopus measuring 300 meters in length appeared on the field, Luffy exclaimed excitedly, "I've decided! I'm going to make this Sea Monster my crewmate!"

Luffy's words stunned everyone; they hadn't expected Luffy to come up with such a thought. However, Luffy's eyes were filled with determination and anticipation.

"Luffy, this Sea Monster is huge and powerful. I'm afraid we won't be able to subdue it," Chopper said worriedly.

"It's alright, I'm going to be the Pirate King, and I won't back down from any challenge!" Luffy said confidently.

Haku let these people run wild!

In his perception, he had already located the Fish-Man Island and the enormous Noah's Ark!

Just then, an object that felt like an axe flew out of Noah's Ark.

Their target was a building within the Fish-Man Island Royal Palace!

Is Vander Decken IX currently on Noah's Ark?

Haku's eyes narrowed slightly, wondering whether she should kill the man to do Neptune a favor.

The thought flashed through her mind, and Haku decided to spare Vander Decken IX's life for the time being.

After all, the Mark-Mark Fruit on that opponent is quite fun! If I kill them from a distance now, I might not be able to get the Mark-Mark Fruit!

At this moment, the Giant Octopus had approached the Thousand Sunny, its tentacles waving in the seawater and making a huge sound. Luffy, Zoro, Sanji, and the others, wearing underwater gear, were ready for battle.

Without hesitation, the Giant Octopus approached the Pirates, its tentacles covered in suckers about to smash into the Thousand Sunny!

Luffy punched the octopus away, preventing the terrifying beast from getting any closer to the Thousand Sunny.

"Moss Head! Let's attack together!"

Zoro nodded, and the three of them charged toward the Giant Octopus together. Luffy punched the octopus's tentacles, Zoro swung his Three Sword Style at the octopus's body, and Sanji used his Black Leg to launch agile attacks.

With the combined efforts of the three, the Giant Octopus began to show signs of strain.

Very quickly! It immediately signaled to Luffy that it was surrendering.

Seeing this, Luffy stopped attacking, scratched his head, and looked at the Giant Octopus with some confusion.

"Hey, are you planning to surrender?" Luffy shouted.

The Giant Octopus nodded, its tentacles swaying gently in the air, as if gesturing to Luffy.

"Haha, looks like you really want to be my crewmate!" Luffy laughed excitedly, turning to Zoro and Sanji. "Look, this guy seems to really want to join us!"

Zoro and Sanji exchanged a glance, both showing helpless expressions. They had long been somewhat used to their captain's capricious nature. Anyway, Luffy's enthusiasm only lasted for three minutes at most!

After returning with their spoils, the Thousand Sunny was led by the Sea Monster to Fish-Man Island.