Chapter 499: The Fantasy Adventure of the Mist War Song, the Mystery of the Giant Whale, and the Und

During the voyage after leaving the underwater city, the mysterious sea fog appeared again, surrounding the Thousand Miles Sunshine. This time the fog was thicker than before, like a white wall, isolating them from the outside world.

Luffy stood at the bow, frowning slightly: "This fog is a bit strange, everyone be careful." The companions nodded and prepared themselves. Franky activated all the detection equipment on the ship, but the signals were interfered by the fog and could not work properly.

Suddenly, a melodious song came from the fog. The song was ethereal and charming, as if it had a kind of magic that made people unconsciously want to get closer. Usopp covered his ears and said, "This song is wrong. Don't be confused!" However, some crew members were still affected by the song. Their eyes became blurred and they walked towards the direction of the song.

Luffy rushed over and pulled the confused crew members back with his rubber arms: "Cheer up!" Zoro looked around vigilantly: "There must be something playing tricks in this fog."

At this moment, some creatures that looked like mermaids but were also strange emerged from the mist. Their eyes flashed with strange light, and their tails swayed in the sea, splashing water. These creatures swam around the ship, and the singing came from their mouths.

Nami took out the weather stick and tried to disperse the fog and these creatures: "Wind!" A strong wind blew, but the fog and creatures were not affected much. Sanji stared at these creatures and found that they seemed to be using their singing to control the surrounding water vapor to maintain the fog: "These guys want to trap us with the fog and then catch us all in one fell swoop."

Robin uses the power of the Hana-Hana no Mi to grow many arms around the ship, trying to catch the creatures, but their bodies are slippery and difficult to catch. Brook plays the Soul Sound, trying to counter their singing with music: "Yo-ho-ho, look at my soul symphony!" His music interweaves with the singing of those creatures, creating a strange resonance in the mist.

Chopper transformed into his combat form and guarded the key positions of the ship to prevent the creatures from approaching. Luffy saw the right moment and leaped towards one of the creatures: "Rubber guns!" His attack made the creatures retreat slightly, but they soon surrounded him again.

During the battle, everyone discovered that these creatures were somewhat afraid of strong light. So Franky activated the strong light device on the ship, and the strong light shone into the fog, causing the creatures to panic. Taking this opportunity, Luffy and others launched a more fierce attack.

After a hard fight, they finally repelled these mysterious creatures, and the fog gradually dissipated. But before they could catch their breath, the sea surface around the ship began to fluctuate violently, as if something huge was swimming on the seabed.

"Oh no, there's a big guy!" Luffy shouted. A huge whale emerged from the seabed. Its body was several times larger than the Thousand Sunny, and its body was covered with mysterious patterns. The whale opened its huge mouth, and a powerful suction force sucked the seawater and the ship into its mouth.

Luffy stretched out his arms and held on to the fixed objects on the boat to prevent himself from being sucked away: "Everyone, don't get sucked in!" Zoro, Sanji and others also used their own skills to stabilize their bodies. Franky increased the power of the boat and tried to escape the suction range of the whale, but the effect was minimal.

At this moment, the whale suddenly stopped sucking, and its eyes stared at Luffy and the others, with a look that seemed to have some deep meaning. "This whale seems to have something to say." Robin said. Luffy jumped on the whale's head and patted it gently: "Hey, you guy, why are you attacking us?" The whale made a low sound, and the sound seemed to convey some kind of message.

After Robin's interpretation, they learned that the whale was the guardian of this sea area. It felt the change in the energy fluctuations of the underwater city and thought someone was destroying the balance here, so it launched an attack. Luffy smiled and said, "We went there to stabilize the energy core and avoid disaster." The whale seemed to understand what they said, and the hostility in its eyes disappeared.

The whale took them around the sea and showed them some wonderful landscapes and ancient ruins hidden under the sea. In an underwater cave, they found an ancient shipwreck with many precious artifacts and mysterious treasure chests. Luffy and others excitedly entered the shipwreck to explore.

In the cabin of the sunken ship, they found some special navigation instruments and an ancient diary. The diary recorded a legend about a lost ocean civilization, which once had the ability to control the power of the ocean, but was cursed due to overuse and eventually disappeared in the long river of history.

"This information may be related to the mysterious incident we encountered before." Ling Tian said while looking at the diary. They continued to search the sunken ship and found some strange symbols and patterns, which seemed to point to a certain direction.

After leaving the sunken ship, the whale took them to a new sea area. The water in this sea area was colorful, like a gorgeous painting. In this sea area, they encountered a group of talking marine creatures. These creatures had various shapes and colors. They surrounded the ship and looked at Luffy and others curiously.

One of the creatures that looked like a dolphin said, "Are you guests from afar? Welcome to our home." Luffy responded with a smile, "Hello! This is such a beautiful place." These marine creatures invited them to participate in an underwater celebration.

At the celebration, Luffy and others tasted all kinds of delicious underwater fruits and enjoyed the unique underwater dance. However, halfway through the celebration, a group of mysterious black shadows suddenly appeared, which quickly devoured everything around them, including those joyful marine creatures.

Luffy and his companions immediately took action and started fighting these black shadows. They found that these shadows seemed to be composed of some kind of negative energy, and ordinary attacks had little effect on them. Luffy tried to attack with his rubber fist, but his fist passed through the shadows and did not cause any damage to them.

Zoro swung his sword, trying to use his sword energy to disperse the shadows: "Three Swords Style? Secret Technique? Three Thousand Worlds!" His attack caused the shadows to temporarily disperse, but they soon gathered again. Sanji used the Devil's Wind Kick, kicking out a series of flaming attacks: "Devil's Wind Kick? Memories of Hell!" The flames burned in the shadows, but they could not completely eliminate them.

Nami observed the surrounding environment and found that the shadows seemed to be avoiding some kind of light. She remembered the experience of dealing with mysterious creatures in the fog before, so she asked Franky to create a strong light. Under the strong light, the shadows began to retreat. Usopp took out his special flash bomb and threw it at the shadows: "Sure Kill? Super? Flash Star!" The flash bomb exploded in the shadows, producing a strong light, making the shadows even more panicked.