Naruto Bond

Lu Fei and Naruto stepped into the dark castle, and a depressing atmosphere hit them. The interior of the castle was gloomy and dim, and strange lights flickered on the walls, as if telling the horror story that had happened here.

"Lu Fei, it's so eerie here." Naruto frowned slightly, the golden Nine-Tails' chakra slowly surging around his body, ready to deal with any possible danger at any time.

Lu Fei held the Thunder Flame Sword tightly, the flames on the sword intertwined with the lightning, emitting a powerful force. "Be careful, there must be a huge danger hidden here."

They moved forward in the castle carefully, with every step full of vigilance. Suddenly, a low roar came from the depths of the castle, full of anger and evil.

"Something is coming out." Lu Fei said in a low voice.

Sure enough, after a while, a huge dark monster rushed out from the depths of the castle. This monster was huge, exuding a strong dark aura, and its eyes were flashing red light.

"What kind of monster is this?" Naruto asked in surprise.

Lu Fei stared at the monster, "No matter what it is, we must defeat it."

As soon as the monster saw Lu Fei and Naruto, it immediately launched an attack. It opened its bloody mouth and spewed out a stream of dark energy towards them. Lu Fei and Naruto quickly dodged, and the dark energy hit the ground, blasting a huge hole.

They used their own strengths to fight fiercely with the monster. The monster's attack was very powerful, which put them in a tough battle. But they did not retreat at all. With their tenacious will and tacit cooperation, they gradually stabilized their position.

During the battle, Lu Fei discovered that there was a faint light flickering in the monster's belly, which might be its weak point.

"Naruto, attack its belly!" Lu Fei shouted.

Naruto immediately used the Shadow Clone Technique, allowing the clones to attack the monster's abdomen from different directions. Lu Fei also wielded the Thunder Flame Sword and took the opportunity to launch an attack.

After a fierce battle, the monster was finally defeated by them. It fell to the ground and gradually lost its vitality.

However, they did not have time to rest, because they knew that there were more powerful enemies waiting for them in the castle. They continued to move forward and came to the core area of ​​the castle.

Here, they saw a huge dark magic circle, which exuded a powerful dark force that made people shudder.

"Is this the source of the evil power?" Naruto asked.

Lu Fei nodded, "It's very likely. We have to find a way to destroy this magic circle."

They began to study how to destroy the dark magic circle. After some effort, they found that there was a dark gem at the core of the magic circle. As long as this gem was destroyed, the magic circle could be destroyed.

However, it is not easy to get close to the dark gem. There is a strong dark energy protecting the magic circle, and once you get close, you will be seriously hurt.

"What should we do?" Naruto asked.

Lu Fei thought for a moment, "We can use the power of the sacred force and the power of the magic crystal to fight against the dark energy."

They began to mobilize the divine power and the power of the magic crystals in their bodies. Light emanated from them, fighting against the dark energy.

Under the protection of the divine power and the power of the magic crystal, they gradually approached the dark gem. When they reached out to touch the dark gem, a strong rebound force shook them away.

"It seems not that easy." Lu Fei got up from the ground and wiped the blood from the corner of his mouth.

Naruto also stood up, his eyes full of determination. "We can't give up, let's try again."

They mobilized their strength again and rushed towards the Dark Gem. This time, they controlled their strength more carefully, gradually weakening the rebound force of the Dark Gem.

After a lot of hard work, they finally succeeded in destroying the dark gem. The dark magic circle also collapsed, and the dark atmosphere in the castle gradually dissipated.

Lu Fei and Naruto breathed a sigh of relief.