Naruto Bond

Lu Fei and Naruto rushed towards the direction of the ancient mineral vein. Along the way, the surrounding environment became more and more desolate. The originally lush vegetation gradually became sparse, the land became dry and full of gravel, and gusts of dust rose in the sky from time to time, as if foreshadowing the dangers ahead.

Soon, they arrived at the ancient mine. They saw rolling mountains in front of them, with huge mine entrances on the mountains. Some places still had traces of past mining, but now they looked dilapidated and gloomy. There was a pungent metallic smell around the mine, and dull echoes from time to time, as if there were countless unknown secrets hidden under the mine.

"The gold elemental gem should be in here. Let's go in and look for it, but be careful." Lu Fei gripped the Thunder and Flame Sword tightly and walked towards the entrance of a larger mine first. Naruto followed closely behind him, also vigilantly observing the movements around him.

When they first stepped into the mine, the light inside was very dim, with only a few faintly glowing ores embedded in the walls providing some light. They slowly went deeper along the winding passage, the road under their feet was rugged and uneven, and from time to time they could step on some scattered ores, making crisp sounds, which seemed particularly abrupt in this silent mine.

As they walked, suddenly, many metal puppets fell from the top and walls of the mine. These puppets were made of hard metal, and their joints flashed strange red light. They looked like human beings, but they had sharp metal claws and cold mechanical light in their eyes. As soon as they landed, they rushed towards Lu Fei and Naruto.

"Be careful!" Lu Fei shouted, wielding the Thunder Flame Sword and performing the "Flame Thunder Demon Slash". The flames and lightning on the sword slashed at the metal puppets that were rushing towards him. The sword energy hit the puppets, splashing sparks and leaving shallow scratches on their hard metal shells, but these puppets did not stop and continued to attack.

Seeing this, Naruto used the Shadow Clone Technique, and many shadow clones dispersed. Some hugged the metal puppets, trying to restrict their movements; others found the right time to attack the puppets' joints, eyes and other vital parts. The real Naruto quickly formed hand seals on the side, preparing to use a powerful ninjutsu to counterattack.

"Senjutsu? Wind Style? Nine-tailed Rasenshuriken!" Naruto shouted, and a huge Rasenshuriken appeared in his hand, and immediately flew towards the densest area of ​​the metal puppets. The Rasenshuriken continued to grow in size during the flight, and the powerful force engulfed several metal puppets. With a violent explosion, the parts of those puppets were blown apart, temporarily blocking the attacks of the other puppets.

However, more metal puppets continued to pour in from the depths of the mine. They seemed tireless and rushed towards Lu Fei and Naruto one after another. Moreover, these puppets began to cooperate with each other in the attack. Some were responsible for frontal attacks, while others launched sneak attacks from the sides and above, making the two of them overwhelmed.

During the battle, Lu Fei discovered that although the shells of these metal puppets were hard, their energy core seemed to be in the chest. There was a special piece of metal there that flashed every time an attack was launched. Perhaps destroying that piece of metal would make the puppet lose power.

"Naruto, attack the energy core in their chest, that's their weak point!" Lu Fei shouted loudly.

After hearing this, Naruto immediately ordered his shadow clones to change the direction of attack and attack the energy cores in the chests of the metal puppets. The real Naruto used "Senjutsu? Molten Release? Rasenshuriken". The high-temperature Molten Release Rasenshuriken with blazing flames accurately hit the energy core in the chest of a metal puppet. The metal sheet on the puppet's chest was instantly melted, and the puppet stopped moving, fell to the ground with a bang, and turned into a pile of scrap metal.

Lu Fei took the opportunity to perform the "Flame Thunder Overlord Slash". He increased the power of the Thunder Flame Sword to the extreme, and slashed at the energy cores in the chests of other metal puppets with all his strength. Under their attack, one metal puppet after another lost power and fell to the ground, making a clanging sound.

After dealing with this wave of metal puppets, they continued to explore deeper into the mine. The deeper they went, the higher the temperature became. The surrounding ores became more precious and contained powerful energy fluctuations. Finally, at the deepest part of the mine, they saw a huge stone platform. On the stone platform was a gem emitting dazzling golden light. The light was so bright that it seemed to gather all the metal power in the world. It was the gold element gem they had been looking for.

"Found it!" Lu Fei said excitedly, but just as he was about to step forward to take the gem, a circle of golden energy shield suddenly surged out around the stone platform. Complex runes flashed on the shield, emitting a powerful defensive force, protecting the gem firmly inside.

"There's a shield again. It seems that this gem is not easy to get." Naruto said with a frown.

They approached the shield and began to observe it carefully. After some research, they found that the runes on the golden shield were in harmony with the energy of the surrounding ore, and the energy flow of the shield seemed to have a specific law. As long as they followed this law and injected the power that counteracted it at the same time, they might be able to break the shield.

After thinking for a moment, Lu Fei and Naruto acted in tacit understanding. Lu Fei adjusted the flame and lightning power on the Thunder Flame Sword to a specific state, and injected power into the shield in the reverse order of the rune energy flow. Naruto condensed chakra and transformed it into a soft force with metal restraint properties, cooperating with Lu Fei to attack the shield.

As they continued to inject power, the runes on the golden shield began to flicker more and more chaotically, and the energy gradually became unstable. The light of the shield gradually dimmed, and finally, as a burst of energy waves dissipated, the shield completely disappeared.

Lu Fei hurried forward and carefully picked up the gold element gem. It felt heavy in his hand, and had a cold and hard texture. He could clearly feel the powerful gold power contained in it.

"Now all we're missing is the earth element gem. We have to go find it quickly." Lu Fei said.

"Well, I hope we can find it successfully, so that we can collect all five gems." Naruto responded.

They left the ancient mine with four elemental gems, and followed the clues to head towards the mysterious valley where the earth elemental gems might be hidden.