Chapter 512: Mysterious Island Exploration Adventure, Fog Sea Comes to a New Crisis Journey

"You insignificant humans, how dare you break into my territory? I will destroy you all!" The Dark Knight said in a low voice. Luffy looked at the Dark Knight and responded loudly: "We will not be defeated by you, come at me if you have the guts!"

The Dark Knight swung his spear and stabbed at Luffy. Luffy dodged the spear's attack with his rubber arm and took the opportunity to counterattack with his rubber fist: "Rubber? Machine gun? Hit me!" His attacks rained down on the Dark Knight, but the Dark Knight's armor was very hard and Luffy's attacks did not cause much damage to him.

Seeing this, Zoro, Sanji and others immediately joined the battle. They fought fiercely with the Dark Knight, and various skills shone in the darkness. During the battle, they found that the Dark Knight's weakness was his helmet. As long as his helmet was broken, they could attack his head and defeat him.

Luffy and the others began to focus on attacking the Dark Knight's helmet. Nami used the weather stick to summon a strong wind, blowing up the sand and stones on the ground to block the Dark Knight's vision. Usopp used a special "helmet-destroying bomb" to fire at the Dark Knight's helmet. The bomb exploded on the helmet, causing some cracks to appear on the helmet.

Chopper transforms into a giant form and hits the Dark Knight's helmet with his antlers. Robin uses the power of the Hana-Hana-no-fruit to grow arms on the Dark Knight's helmet and pulls hard. Franky attacks the Dark Knight's helmet with laser beams, and Brook uses the Soul Sound to interfere with the Dark Knight's actions.

With everyone's joint efforts, the Dark Knight's helmet was finally broken. Luffy seized the opportunity and used the strongest rubber attack: "Rubber? Great Ape King Spear? Dawn!" This punch hit the Dark Knight's head with great force. The Dark Knight screamed and disappeared in the dark vortex.

As the Dark Knight disappeared, the runes on the crystal column began to flicker, and a powerful energy surged out of the crystal column and injected into the bodies of Luffy and others. They felt that their strength had been enhanced and their bodies were full of vitality.

They left the temple and headed for the third ruins. On the way to the third ruins, they encountered a dense forest. The trees in the forest were tall and dense, and their branches and leaves were intertwined, forming a natural maze.

They lost their way in the forest and couldn't find the exit. Just when they were extremely anxious, a cute little animal appeared in front of them. The little animal had a small and exquisite body, furry, big eyes, and looked very smart.

"Are you lost? I can lead you out of this forest." The little animal said. Luffy and the others happily agreed. The little animal led the way in front and they followed behind.

As they walked through the forest, they found that there were many traps hidden in the forest. Some traps were spikes hidden underground, and some traps were nets hanging from trees. If you accidentally triggered a trap, you would be in danger.

The little animal cleverly avoided all the traps with its cleverness. Under its leadership, they finally walked out of the forest. Soon after, they found the third relic. The relic was an ancient castle with tall and solid walls, which were engraved with various defensive runes.

The castle gate was closed, and there was a strong magical atmosphere around it. They tried to find a way to open the gate, but they couldn't find it after searching for a long time.

Just when they were at a loss, a rainbow suddenly appeared in the sky. The light of the rainbow shone on the gate of the castle, and a huge magic circle appeared on the gate. The magic circle was flashing with light of various colors, as if waiting for their input.

"Could this be the key to open the door?" Robin looked at the magic circle and thought. Luffy looked at the magic circle and suddenly thought of his previous experience on the Rainbow Bridge. He said, "I know, we need to use different colors of energy to activate this magic circle."

So, they began to look for different colors of energy. Nami used the weather stick to summon red flames and blue lightning, and Usopp used a special "color energy bullet" to emit yellow, green and purple energy respectively. Chopper transformed into a special form and released white light. Franky used laser beams to emit orange energy. Brook used the sound of the soul to generate pink energy fluctuations.

They gathered these different colored energies together and input them into the magic circle. After the magic circle absorbed the energy, it began to flicker. The door slowly opened, and a powerful sacred aura emanated from inside.

They walked into the castle and found a huge hall inside. In the center of the hall was a huge angel statue with its wings spread out, as if it was about to fly. In the hands of the statue was a golden star, which shone brightly.

As they approached the statue, it suddenly came alive. The angel statue's eyes glowed blue, and it flapped its wings and attacked Luffy and the others. The angel statue's attack was filled with divine power, and its feathers were as sharp as blades.

Luffy used his rubber arm to dodge the angel statue's attack: "Rubber? Skipping rope!" Zoro used his sword to block the angel statue's feather attack: "Three Swords Style? Three Thousand Worlds!" Sanji used the Devil's Wind Kick to kick out flaming kicks in the air: "Devil's Wind Kick? The finishing touch!"

Nami summoned wind with the weather stick, blowing the feathers of the angel statue to one side. Usopp took out a special "Angel Feather Destroying Bomb" and fired it at the angel statue. The bomb exploded on the statue, blowing off some of the feathers.

Chopper transforms into a giant form and hits the angel statue with his body. Robin uses the power of the Hana-Hana no Mi to grow arms around the angel statue, trying to stop it from moving. Franky uses laser beams to attack the vital parts of the angel statue, while Brook uses the Voice of the Soul to interfere with the angel statue's movements.

During the battle, they discovered that the angel statue's weakness was the golden star in its hand. As long as they captured the golden star, they could control the angel statue.

Luffy and the others began to focus on attacking the angel statue, trying to grab the golden star. Luffy stretched out his rubber arm to grab the golden star. Zoro, Sanji and the others covered Luffy on the side.

After a fierce battle, Luffy finally succeeded in taking the golden star. After losing the golden star, the angel statue stopped attacking and turned back into a statue.

They left the castle with the golden star, and the entire mysterious island began to tremble violently. They knew that their actions had triggered a certain mechanism on the island, and the island might be about to undergo a huge change.

Luffy and the others hurried to the beach, and when they arrived, they saw the island slowly sinking. They took a small boat and quickly returned to the Thousand Sunny.

Not long after they left the island, the island completely sank into the seabed with a loud roar. Luffy and the others looked at the disappeared island with a lot of emotion in their hearts. They knew that although this adventure was full of dangers, it also brought them a lot of gains.

They continue to sail on the sea, not knowing what kind of challenges they will encounter in the next adventure. But they are not afraid, because they are the Straw Hat Pirates, a group of adventurers who always pursue their dreams and move forward courageously.

After leaving the mysterious sunken island, Luffy and his friends continued to sail on the vast ocean. A few days later, a strange fog suddenly rose on the sea. The fog spread very quickly and enveloped the Thousand Sunny in the blink of an eye.

"Everyone be careful, this thick fog is a bit weird!" Franky warned loudly, while paying close attention to the changes in the instruments on the ship. However, all the instruments seemed to be cast a spell by the thick fog, and the pointers spun wildly and then failed one after another.