Naruto Bond

Lu Fei and Naruto slowly approached the dark castle. There was a chilling dead silence in front of the city gate. Just as they were about to step into the city gate, the ground suddenly shook violently, and huge black spikes broke out from the ground, like sharp blades, stabbing towards them.

Lu Fei reacted quickly, and the Thunder Flame Sword danced in his hand into a light and shadow, "Flame Thunder Slash!" He shouted, and the flames on the sword intertwined with the power of thunder and lightning, cutting off the approaching black spikes one after another. Naruto also performed the Shadow Clone Technique, and many shadow clones dispersed, some assisted Lu Fei in resisting the spikes, and some rushed towards the source of the spikes, trying to find the manipulator behind the scenes.

Naruto quickly formed seals on the side, "Senjutsu? Lava Release? Rasenshuriken!" The huge Rasenshuriken, carrying high-temperature lava, flew towards the area where the underground spikes were densest. With a loud bang, the Rasenshuriken exploded, blasting a large hole in the ground, and the attack of the black spikes also stopped temporarily.

However, before they could catch their breath, a row of dark magicians suddenly appeared on the castle wall. These magicians were dressed in black robes, with hideous masks on their faces, and holding staffs inlaid with black gems in their hands. They were muttering something, and the gems on the tops of the staffs were flashing with strange light. Then, black magic beams shot towards Lu Fei and Naruto.

Lu Fei and Naruto dodged quickly. The magic beam hit the ground, creating large holes and splashing rocks everywhere. "These magicians are not easy to deal with. We have to deal with them first!" Lu Fei shouted.

He wielded the Thunder Flame Sword and rushed towards the castle wall, trying to get close to the dark magicians. Naruto then used the "Senjutsu Wind Style Nine-tailed Rasenshuriken" and threw it at the magicians on the wall. The Rasenshuriken grew larger as it flew, and its powerful force destroyed some of the defense facilities on the wall, causing the dark magicians' attacks to pause for a moment.

During the battle, Lu Fei discovered that when these dark magicians cast spells, there would be a black energy line connecting them, which seemed to be the key for them to share magic power and fight together.

"Naruto, attack the energy connection between them!" Lu Fei shouted loudly.

After hearing this, Naruto immediately ordered his shadow clones to change their targets and attack the energy lines between the dark magicians. The real Naruto used the "Senjutsu Super Rasengan" and threw it towards a more obvious energy line.

The giant Rasengan hit the energy line accurately, and the line broke instantly. The bodies of several dark magicians connected to it were shaken, and the magic supply became disordered, and the attack became chaotic. Lu Fei took the opportunity to perform "Flame Thunder Demon Slash". He increased the power of the Thunder Flame Sword to the extreme and slashed at the magicians with all his strength. The blade passed by, and the dark magicians fell one after another.

But soon more dark soldiers and magicians emerged from the castle, rushing towards Lu Fei and Naruto like a tide. These dark soldiers held various weapons, their eyes were empty but full of murderous intent, and they cooperated tacitly with the magicians to form a powerful attack line.

Lu Fei and Naruto stood back to back, supporting each other, and engaged in a fierce close combat with the enemy. Lu Fei's Thunder Flame Sword swung among the dark soldiers, and each sword could take away the lives of the enemies, while Naruto used the Shadow Clone Technique to create chaos, and at the critical moment, his main body used a powerful ninjutsu to give the enemy a fatal blow.

During the fierce battle, Lu Fei realized that the actions of the dark soldiers and magicians seemed to be commanded by a powerful force deep in the castle. As long as he could destroy that commanding force, he might be able to turn the tide of the battle.

"Naruto, we have to find a way to rush into the castle and find the source of that command force!" Lu Fei shouted.

They began to fight their way into the castle, Lu Fei led the way, the power of the Thunder Sword blazing like fire, repelling the approaching enemies one after another. Naruto covered them from behind, performing various ninjutsu to stop the enemy's pursuit.

After a hard fight, they finally broke through the enemy's defenses and stepped into the castle. The castle was dark and damp, the corridors were filled with a foul smell, and the walls were flashing with strange lights. They walked carefully along the corridors, and suddenly, a huge dark hall appeared in front of them.

There was a huge dark magic circle in the center of the hall, and a huge dark magic crystal floated on the magic circle. The magic crystal exuded a strong dark aura, and was surrounded by several powerful dark guardians. These guardians were tall, covered with black scales, with sharp claws and huge wings, and their eyes were like two burning black flames.

"This magic crystal must be the key, we must destroy it!" Lu Fei said.

They rushed towards the magic circle without hesitation, but the dark guardians immediately launched an attack. They spread their huge wings and pounced towards Lu Fei and Naruto, their sharp claws slashing through the air, causing a whistling sound.

Lu Fei and Naruto quickly separated, and Lu Fei used the "Flame Thunder Tyrant Slash" to slash at a dark guardian. The power of the flame and thunder on the Thunder Sword collided with the guardian's scales, splashing a spark, and although it left a mark on the scales, it failed to cause substantial damage to it.

Naruto used the Shadow Clone Technique, and many of his Shadow Clone Techniques fought fiercely with the Dark Guardian. The real Naruto gathered his chakra aside, ready to use a powerful ninjutsu to deliver a fatal blow.

During the battle, Lu Fei discovered that when these dark guardians launched an attack, a scale on their backs would slightly curl up, and the defense there seemed to be relatively weak.

"Naruto, attack the scales on their backs!" Lu Fei shouted loudly.

After hearing this, Naruto immediately ordered his shadow clones to change their attack strategy and attack the scales on the back of the dark guardian. The real Naruto used "Senjutsu? Lava Release? Rasenshuriken" and threw it at the scales on the back of a dark guardian.

The Lava Rasenshuriken hit the target accurately, shattering the scales on the back of the Dark Guardian. He let out a painful roar and his body slowed down for a moment. Lu Fei took the opportunity to perform the "Flame Thunder Final Slash". He increased the power of the Thunder Sword to the extreme and slashed at the heart of the Dark Guardian with all his strength. This sword contained great power and successfully pierced the heart of the Dark Guardian, and the Dark Guardian's huge body fell down.

The other dark guardians became even crazier when they saw their companions being defeated. They ignored their own safety and attacked Lu Fei and Naruto even more fiercely.

Lu Fei and Naruto cooperated with each other and continued to fight with the remaining dark guardians. They continued to use powerful attack methods and gradually gained the upper hand. After a hard fight, they finally wiped out all the dark guardians.

At this time, they came to the dark magic circle, ready to destroy the dark magic crystal. However, when they approached the magic crystal, the magic crystal suddenly released a powerful dark force, which enveloped them. This force tried to erode their bodies and wills, and plunged them into endless darkness.

Lu Fei and Naruto gritted their teeth and fought tenaciously against the dark forces with strong will and powerful strength. They completely integrated the power of the artifact with their own power and launched their strongest joint attack. Lu Fei's Thunder Flame Sword and Naruto's Rasenshuriken, which combined the power of immortal law and artifact, flew towards the dark magic crystal at the same time.

With a deafening roar, the attacks of both sides collided. Powerful energy waves spread in all directions, and the entire castle shook violently under the impact of this force. Cracks began to appear in the walls, and stones on the ceiling fell one after another.

In the fierce energy collision, Lu Fei and Naruto gritted their teeth and persisted. They had only one belief in their hearts, which was to destroy the dark magic crystal and protect this continent. In the end, their power gradually gained the upper hand, and the dark magic crystal cracked under the powerful attack and then completely shattered.

As the dark magic crystal was shattered, the dark atmosphere in the castle gradually dissipated. Lu Fei and Naruto successfully destroyed the nest of the dark forces. They stood tiredly in the ruins of the castle, but their eyes were full of the joy of victory.

"It's finally over. The dark power of this castle has been destroyed by us." Naruto breathed a sigh of relief.

"Well, but there are other strongholds of dark forces on this continent, we can't stop." Lu Fei said.

With firm faith, they left the ruins of the dark castle.