Chapter 501: From the island to the sky city, the thrilling journey to challenge the dark magician

Chopper transformed into a giant form and crushed the poisonous spider with his body. His fur was as hard as iron, and the poisonous spider's spikes and venom had no effect on him. Robin used the power of the Hana-Hana Fruit to control the surrounding stones and smashed the poisonous spider to death. Franky used his laser beam and strong body to fight the poisonous spider in close range. Brook used the sound of the soul to interfere with the actions of the poisonous spider, causing them to kill each other.

After killing all the poisonous spiders, they got the last key. They returned to the temple and inserted the three keys into the lock of the gate. With a flash of light, the gate of the temple slowly opened.

Inside was a huge treasure house filled with gold, silver, jewelry, mysterious weapons and ancient books. However, Luffy looked at the treasures and smiled: "Although these things are precious, our real treasure is our adventure and our friends!" The friends all laughed, they knew that the experience of this adventure was more valuable than these material treasures.

They did not take too much treasure, but only picked up some items that were helpful to them, such as some special weapons and books. After leaving the mysterious island, they continued to sail. During the voyage, they encountered new challenges.

One day, a huge vortex suddenly appeared in the sky, and it seemed that it was going to swallow up the entire sky. Under the gravitational pull of the vortex, the ship began to fly uncontrollably into the sky. Luffy and others held on to the objects on the ship tightly, and looked at this strange scene in surprise.

"What's going on? We're being sucked up into the sky!" Usopp shouted. Franky tried to control the ship, trying to get rid of the whirlpool's gravitational pull, but to no avail. Soon, the ship was sucked into the whirlpool and flew into the sky.

In the sky, they found a whole new world with floating islands, flying creatures and mysterious buildings. Their ship landed on a floating island with soft clouds and strange flowers.

When they were exploring the island, they met a group of humans with wings. When they saw Luffy and the others, they were surprised and said, "You came from the ground? This is not the place for you." Luffy smiled and said, "We were swept up by the whirlpool. Where is this place?"

These winged humans told them that this is the Sky City, a world completely different from the ground. The Sky City has its own rules and order, but recently, some abnormal phenomena have appeared here, and some dark forces are eroding this beautiful world.

Luffy and others decided to help the residents of the Sky City solve this problem. Together with the winged humans, they began to investigate the source of the dark power. During the investigation, they found that the dark power came from an ancient sealed tower.

This tower once sealed a powerful dark magician, but as time went by, the seal gradually loosened, and the dark magician's power began to leak out, affecting the entire Sky City. Luffy and others decided to re-strengthen the seal to prevent the spread of dark power.

They moved towards the tower and encountered many creatures controlled by dark forces along the way. These creatures launched a frenzied attack on them, their bodies were shrouded in dark aura, and their attack and defense capabilities were greatly enhanced.

Luffy and his companions fought fiercely with these dark creatures. They used their skills and courage to repel the attacks of the dark creatures again and again. During the battle, they found that these dark creatures were very sensitive to light and positive energy. So, they mobilized their inner positive energy, emitted rays of light, and dispelled the dark aura of the dark creatures.

When they arrived at the tower, they found a powerful dark barrier around the tower. This barrier blocked their progress and continuously released dark energy, causing damage to them. Luffy and others tried to break the barrier in various ways, but none of them succeeded.

When everyone was in trouble, Robin found a way to break the barrier in an ancient book. It turned out that it was necessary to find five bright stones scattered throughout the sky city and gather their power together to break the barrier.

So, they divided into groups and began to search for the Light Stone in the Sky City. Luffy and Zoro were in a group, and they found a Light Stone in a floating mountain. There were strong air currents and ferocious flying beasts in this mountain. They successfully got the Light Stone while fighting with the beasts and dodging the air currents.

Sanji and Nami are in a team. They found a light stone in a mysterious garden. There are all kinds of magical flowers in the garden. Some of these flowers will release charming fragrances, which will make people fall asleep; some will stretch out vines and attack people who approach. Sanji and Nami rely on their wisdom and skills to avoid the attacks of the flowers and find the light stone.

Usopp and Chopper are a team. They found a Light Stone in an ancient castle. The castle is full of traps and mechanisms, and there are knights controlled by dark forces. Usopp used his inventions to crack the traps and mechanisms, while Chopper fought with the knights, and they finally succeeded in getting the Light Stone.

Robin, Franky and Brook are a team. They found a bright stone in a mysterious lake. There are huge water monsters and mysterious whirlpools in the lake. They found the bright stone while fighting the monsters and avoiding the whirlpools.

When they returned to the tower with the five Light Stones, they gathered the power of the Light Stones and fired them toward the dark barrier. The powerful light power broke the dark barrier and they successfully entered the tower.

In the tower, they found the seal of the dark magician. The dark magician saw them coming and laughed arrogantly: "You stupid guys, do you think you can stop me?" He launched a powerful dark magic attack, and the whole tower was shrouded in darkness.

Luffy and his companions were not afraid, and they launched the final battle with the dark magician. Luffy attacked the dark magician with his rubber fist, and his attack was full of a strong sense of justice and positive energy: "Rubber? Giant Spear!" His fist hit the dark magician hard, causing him considerable damage.

Zoro brandished three swords, and the blades slashed at the dark magician like lightning: "Three sword styles? Secret? One? Three thousand? The world!" His attack caused the dark magician's defense to appear.

His attack caused a crack in the dark magician's defense. The dark magician frowned slightly, obviously not expecting these people's attack to be so fierce. But he quickly regained his arrogant demeanor, muttering something, and the dark aura became stronger, turning into black arrows that shot at Luffy and others.