Naruto Bond

Lu Fei and Naruto continued to walk deeper into the grassland. The breeze blew by, bringing a breath of fresh air, which seemed to relieve their fatigue after the war. The two figures gradually walked away on the vast grassland, leaving behind a series of deep or shallow footprints, which were a symbol of their perseverance.

As they walked, they heard a faint roar, a low and continuous sound, like a heartbeat coming from deep in the earth. As they continued to move forward, the roar became clearer and clearer, and the air around them began to vibrate slightly, and the ground under their feet seemed to be responding to this mysterious power.

"This sound is a bit strange, we have to be careful." Lu Fei held the Thunder Flame Sword tightly and looked around vigilantly. His eyes were as sharp as a falcon, not missing any slight movement.

Naruto nodded as well, and he mobilized the chakra in his body, ready to deal with possible dangers. "It feels like there's something big nearby," he said, his eyes fixed on the direction where the sound came from.

When they climbed over a small hill, they were shocked by the scene in front of them. They saw a huge vortex in front of them. The vortex was located in the center of the grassland and had a diameter of several hundred meters. Dust was flying in the vortex, and the wind was howling. The surrounding grass and wild flowers were sucked into it by the strong suction force and disappeared in an instant. The air around the vortex was distorted, as if the space was affected by this force.

"What is this? It looks dangerous." Naruto said with a frown.

Lu Fei carefully observed the vortex and found that there seemed to be some strange lights and shadows flickering in the vortex, like some kind of ancient runes. "This may be a magic circle or something like that. Let's not get close to it." He said.

However, just as they were about to bypass the vortex, the suction of the vortex suddenly increased. Lu Fei and Naruto only felt a strong force pulling them, and they quickly stabilized their bodies and poured their strength into the ground under their feet. But the suction of the vortex became stronger and stronger, and their feet gradually left the ground and flew towards the vortex.

"Not good!" Lu Fei shouted, he swung the Thunder Flame Sword, and shot a rope formed by source power towards the ground. The rope penetrated deeply into the ground, temporarily stabilizing their bodies.

Naruto also used the Shadow Clone Technique, and many shadow clones pulled the main body in the opposite direction, trying to resist the suction of the vortex. But the power of the vortex was too strong, the rope began to crack, and the shadow clones were sucked into the vortex one by one.

"This is not a solution. We have to find a way to destroy this vortex." Lu Fei shouted.

Naruto looked at the whirlpool and suddenly an idea came to his mind. "Lu Fei, let's attack the center of the whirlpool together and use our power to break its balance."

Lu Fei nodded, and they exerted their strength at the same time, breaking free from the ropes and shadow clones. Lu Fei raised the Thunder Flame Sword above his head, and the source power flowed into the sword like a river, and the Thunder Flame Sword burst into a dazzling light. "Flame Thunder Explosion Slash!" He shouted, and slashed a huge flame thunder sword energy towards the center of the vortex. The sword energy was like a burning meteor, cutting through the air and rushing towards the vortex.

Naruto used the immortal technique, the Super Large Rasengan, and threw it towards the center of the vortex. The Rasengan continued to grow in size during its flight, and the powerful chakra fluctuations made the surrounding air tremble.

The Flame and Thunder Sword Qi and the Rasengan hit the center of the vortex one after another, causing a violent explosion. The energy shock generated by the explosion spread to the surroundings, and the strong impact temporarily weakened the suction of the vortex.

Lu Fei and Naruto took the opportunity to escape the vortex's suction range. They fell to the ground, gasping for breath. But before they could breathe a sigh of relief, the vortex resumed its suction power after a flash of light, and it was even stronger than before.

"Why is this guy never done?" Naruto said angrily.

Lu Fei looked at the vortex with a frown on his face. He found that after the vortex regained its suction, the runes glowed brighter. "These runes may be the key. We have to find a way to crack them." He said.

They approached the vortex again, this time more cautiously. Lu Fei tried to touch the edge of the vortex with the Thunder Flame Sword to feel the power of the runes. When the blade touched the vortex, a powerful message flooded into his mind. It was some ancient knowledge and the secrets of magic, but the information was disorganized and needed time to sort out.

Naruto stood by to protect Lu Fei. He used the Wind Style Rasenshuriken to cut off the approaching suction flow. But as time went on, the suction force became stronger and stronger, and their situation became more and more dangerous.

"I think I have some idea." Lu Fei suddenly said, and he began to draw some corresponding runes on the ground with the Thunder Flame Sword according to the information sorted out in his mind. After these runes were drawn, they emitted a faint light, echoing with the runes in the vortex.

As Lu Fei drew more and more runes, the rune light in the vortex began to become disordered. The suction force also became unstable, sometimes strong and sometimes weak.

"Naruto, let's attack again!" Lu Fei shouted.

Naruto nodded, and they attacked the center of the vortex again. This time, their attack was more precise, and they attacked directly at the most chaotic part of the rune light.

Under their joint attack, the vortex finally couldn't bear it. With a loud bang, the vortex exploded, and the powerful energy wave swept everything around it. Lu Fei and Naruto were hit by the energy wave and flew backwards. They rolled on the ground for several times before they stabilized their bodies.

When the dust settled, they found a huge pit where the vortex had been, with a mysterious light emanating from it. In the center of the pit, there was an ancient treasure chest, which was engraved with complex patterns and runes, exuding an ancient and mysterious atmosphere.

"What's in here?" Naruto walked towards the treasure chest curiously.

Lu Fei followed, and they carefully opened the treasure chest. A strong force surged out of the treasure chest, but there was no danger. In the treasure chest was an ancient scroll and a gem that emitted a strange light.

"This looks like something powerful." Naruto picked up the scroll and found the words on it to be obscure and difficult to understand.

Lu Fei picked up the gemstone and could feel the powerful energy contained in it. "These things may be helpful for our journey, let's keep them for now," he said.

After they collected the treasures from the treasure chest, they continued walking towards the end of the grassland.