Naruto Bond

Lu Fei and Naruto took the five gems and hurried to the location of the seal in the forest. Along the way, they passed through dense woods and rugged valleys. The surrounding scenery was as mysterious as usual, but they had only one goal in mind at the moment - to strengthen the seal.

When they approached the sealed area, they could clearly feel a powerful force pulling at the surrounding space. The force seemed to have life, constantly fluctuating, as if resisting their arrival. The sealed area was shrouded in a thick mist, and there was a faint light flickering in the mist. It was the power emitted by the seal, but it also revealed a hint of instability.

"The power fluctuations here are so strong, it seems that the seal is really very fragile." Lu Fei said solemnly, holding the Thunder Flame Sword tightly.

Naruto nodded, "We have to hurry and not give the evil forces a chance."

As they stepped into the mist, they immediately felt a huge pressure. This pressure seemed to crush their bodies, and every step required a lot of effort. But they gritted their teeth and walked towards the core of the seal step by step.

In the mist, they saw the full picture of the seal. It was a huge magic circle, engraved with ancient runes and patterns. The runes flickered with light, and cracks appeared in some places. There was a huge hole in the center of the magic circle, as if it was a trace of evil erosion, and a dark breath was slowly seeping out of the hole.

"Where do we put the gem?" Naruto asked as he looked at the complicated magic circle.

Lu Fei carefully observed the magic circle and found that there were five special grooves in the five corners of the magic circle. The shape of the grooves matched the gems they found. "It should be placed there. Let's split up."

They each walked towards a corner and carefully placed the gems into the grooves. When the first gem was placed in the groove, the corresponding rune on the magic circle shone brightly, as if it was reactivated. As the gems were placed one by one, the power of the magic circle gradually increased, and the light became more and more dazzling, and the entire sealed place was illuminated by colorful light.

However, just as they placed the last golden gem, something unexpected happened. The dark power seemed to have sensed their actions, and a powerful black energy surged out of the hole and swept towards them. This black energy was like a black tornado, and wherever it went, the light on the magic circle was swallowed up.

"Not good!" Lu Fei shouted, he raised the Thunder Flame Sword and rushed towards the black energy. The flames and lightning on the sword burst out with all their strength, colliding with the black energy, making a deafening roar. But the black energy was too powerful, and Lu Fei was shocked and flew backwards, falling heavily to the ground.

When Naruto saw Lu Fei was injured, he immediately used his immortal technique, the Super Large Rasengan, and threw it towards the black energy. The moment the Rasengan came into contact with the black energy, a huge explosion occurred, and the black energy was temporarily repelled.

"We have to speed up!" Naruto shouted.

They endured the pain and walked towards the magic circle again. Just as they were about to put the last gem into the groove, the black energy attacked again, and this time it was stronger than before. It condensed into a huge black demon figure, with huge wings and sharp claws, and evil red light flashing in its eyes.

"You ants, how dare you ruin my plan!" The devil let out a low and hoarse roar.

Lu Fei and Naruto showed no fear at all. They stood together, ready for the final battle with the devil.

Lu Fei took the lead in launching the attack. He raised the power of the source to the limit. The flames and lightning on the Thunder Flame Sword intertwined to form a huge energy dragon. "Source Flame Thunder Dragon Slash!" He shouted and slashed at the demon. The energy dragon rushed towards the demon with its fangs and claws, and the space along the way was distorted.

Naruto also used his strongest ninjutsu, "Wind Style? Nine-tailed Rasenshuriken? Super Combo!" Multiple huge Rasenshuriken appeared in his hands, each containing powerful wind attribute chakra and the power of the Nine-tailed Fox. Rasenshuriken flew towards the demon like raindrops, forming a pincer attack with Lu Fei's energy dragon.

The demon laughed wildly at their attack. It flapped its huge wings, creating a powerful airflow that blew away Lu Fei's energy dragon and Naruto's spiral shuriken. Then, it rushed towards Lu Fei and Naruto, grabbing them with its huge claws.

Lu Fei and Naruto quickly separated to avoid the demon's attack. They knew that conventional attacks would not have much effect on this demon, so they had to find its weakness. In the process of dodging, they found that every time the demon launched an attack, a black crystal on its chest would flash, which might be its weakness.

"Naruto, attack the crystal on its chest!" Lu Fei shouted.

After hearing this, Naruto immediately rushed towards the demon. He used the Shadow Clone Technique, and many clones attacked the demon from all directions to attract the demon's attention. The real Naruto was looking for an opportunity to launch a fatal blow to the crystal on the demon's chest.

Lu Fei was also constantly attacking the demon. He used the Thunder and Flame Sword to restrain the demon, preventing it from fully responding to Naruto's attack.

After a demon attacked Lu Fei, the crystal on his chest flashed, and Naruto seized the opportunity. He gathered all his chakras together and used "Senjutsu? Shin? Super Large Rasengan? Destruction Impact". This Rasengan was bigger and more powerful than ever before. Naruto smashed the crystal on the demon's chest hard, and the moment the Rasengan came into contact with the crystal, it emitted an extremely dazzling light.

The demon screamed in pain, and its body was thrown backwards by the powerful force. A crack appeared on the crystal, and black energy leaked out from the crack.

Lu Fei saw the right moment and used "Source Flame Thunder Explosion Slash" again, slashing at the crystal on the demon's chest. This sword contained all his strength, and the Thunder Flame Sword accurately hit the crack on the crystal. In a huge explosion, the crystal shattered, and the demon let out a final roar, and then his body gradually dissipated, and the black energy disappeared with it.

"We did it!" Naruto shouted excitedly.

Lu Fei also showed a relieved smile, "Yes, quickly complete the seal."

They put the last gem into the groove, and the magic circle instantly burst out with an extremely powerful force. The light illuminated the entire mysterious forest, the cracks in the seal began to repair quickly, and the dark aura was completely dispelled. The magic circle stabilized again, emitting a peaceful and powerful force, protecting this forest and the continent of Teyvat.

Lu Fei and Naruto sat on the ground tiredly. They looked at the seal that had been stabilized again, and their hearts were filled with a sense of accomplishment.