Naruto Bond

After successfully defeating the bat creature, Lu Fei and Naruto continued to move forward in the cave. The cave now seemed even more eerie and silent, with only the sound of their footsteps echoing in the air.

They walked along the winding passage, the light on the wall flickered, as if hinting at the unknown fate ahead. The Thunder Sword in Lu Fei's hand emitted a faint light, illuminating the way ahead for them. Naruto watched his surroundings vigilantly, ready to deal with any possible dangers at any time.

"How deep is this cave?" Naruto asked in a low voice.

Lu Fei frowned slightly, "I don't know, but we must keep moving forward until we find the clue to the Dragon Ball."

Suddenly, they felt a powerful magical wave coming from the front. This wave was full of oppression, and made their heartbeats speed up involuntarily.

"Be careful, a powerful force is approaching." Lu Fei warned.

Naruto immediately entered combat mode, the golden Nine-Tails' chakra surging around his body. "No matter what it is, we will not back down."

As they moved forward, a huge figure gradually appeared in their sight. It was a monster made of dark energy, its body constantly changing shape like smoke, and its eyes flashing with strange purple light.

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

Lu Fei held the Thunder Flame Sword tightly, "It looks like a dark magic creature, very dangerous."

The dark monster saw Lu Fei and Naruto and immediately launched an attack. It stretched out countless dark tentacles and swept towards them. Wherever the tentacles passed, the air seemed to be corroded.

Lu Fei immediately unleashed the power of the Thunder Flame Sword, and the flames and lightning on the sword intertwined into a powerful barrier, blocking the attack of the dark tentacles. The flames and lightning collided with the dark tentacles, making bursts of harsh sounds.

Naruto was not to be outdone, he used the power of the golden nine-tailed beast, and a huge beast ball condensed in his hand. He threw the beast ball at the dark monster, and the beast ball exploded, and the powerful impact made the dark monster's body shake.

The dark monster was enraged, it let out a low roar, and the dark energy on its body became more intense. It attacked again, this time with thicker and faster tentacles.

Lu Fei and Naruto kept dodging the attacks of the dark tentacles. They quickly shuttled through the cave, using the terrain and rocks to avoid the monster's attacks.

During the battle, Lu Fei and Naruto kept looking for the weakness of the dark monster. They found that the core of the dark monster seemed to be the source of its power.

"Naruto, attack its core," Lu Fei shouted.

Naruto nodded, and he used the power of the golden nine-tailed beast, and a huge tailed beast jade flew towards the core of the dark monster. However, the dark monster seemed to be aware of their intentions, and it used its dark tentacles to form a solid defense line to block the attack of the tailed beast jade.

The Tailed Beast Ball exploded, but it did not cause much damage to the core of the dark monster. The dark monster attacked even more frantically, and its tentacles attacked Lu Fei and Naruto like a rainstorm.

Lu Fei and Naruto were in a bitter battle. They kept trying various methods to attack the core of the dark monster, but they were all cleverly resolved by the dark monster.

At the critical moment, Lu Fei thought of a way. He decided to use the special power of the Thunder Flame Sword to try to absorb part of the dark energy of the dark monster and then fight back.

"Naruto, help me attract the monster's attention, I will try to absorb its energy." Lu Fei shouted.

Naruto agreed without hesitation. He used various powerful ninjutsu to continuously attack the dark monster and attract its attention.

Lu Fei took the opportunity to insert the Thunder Flame Sword into the ground, and the light on the sword began to flicker. He concentrated his energy and tried to absorb the dark energy of the dark monster.

At first, the dark energy was very resistant, but as Lu Fei continued to work hard, some of the dark energy began to be absorbed by the Thunder Flame Sword. The light on the sword became more dazzling, and at the same time it was filled with a dark aura.

After absorbing enough dark energy, Lu Fei unleashed a full-strength attack. He swung the Thunder Flame Sword, and a powerful sword energy flew towards the core of the dark monster. This sword energy combined the power of the dark energy and the Thunder Flame Sword, and was extremely powerful.

The sword energy accurately hit the core of the dark monster, and the dark monster let out a painful roar. Its body began to collapse, and the dark energy gradually dissipated.

As the dark monster fell, peace returned to the cave.