Genshin Impact.

Lin Feng stood on the top of the mountain, the wind whistling through his hair. Behind him were the old man, Amber and Li'er, their eyes revealing determination and resoluteness.

In the previous adventures, they had gone through countless hardships and tests. Mysterious ruins, terrifying demons, and strange traps almost killed them every time. However, it was in these life-and-death struggles that the friendship between them became deeper and deeper, as indestructible as steel.

At this moment, they are facing a new challenge. In the distance, an ancient castle stands in the clouds. There is an evil atmosphere around the castle, which makes people shudder. According to legend, there are endless treasures hidden in the castle, but there are also powerful guardians. Countless adventurers have entered it, but no one has ever come out alive.

"Lin Feng, this adventure may be a life-threatening one. Do you regret traveling with us?" The old man looked at Lin Feng with a hint of worry in his eyes.

Lin Feng smiled slightly, with a determined light in his eyes: "Senior, from the moment I set foot on this path, I have never regretted it. We are together through life and death, and we will definitely overcome this difficulty."

Amber patted Lin Feng on the shoulder: "That's right, we have been through so much together, and we will definitely succeed this time."

Li'er also nodded: "With everyone here, I'm not afraid of anything."

The four of them smiled at each other and walked towards the castle. The castle gate was closed, and strange runes were engraved on the door. Lin Feng stretched out his hand and gently touched the runes, and a powerful force bounced him back.

"Be careful!" the old man shouted loudly and flew over to catch Lin Feng.

"The runes on this door seem to have powerful restrictions. We must find a way to break them." Amber said with a frown.

Lin Feng stood up and observed the runes carefully: "These runes seem to be similar to a formation I saw in ancient books before. Maybe we can find the center of the formation and crack it."

After some searching, they finally found the center of the formation on the left side of the gate. Lin Feng gathered all his strength and blasted towards the center of the formation. With a loud bang, the center of the formation was destroyed and the gate slowly opened. A rotten smell came to his face, making people nauseous.

The four of them walked into the castle carefully. The castle was dark and damp, with strange lights flickering on the walls. Suddenly, a group of black shadows rushed in from all directions and pounced on them.

"It's the Shadow Demon! Everyone be careful!" the old man shouted.

Lin Feng drew his sword and started a fierce battle with the shadow demon. Amber and Li'er also cast their own spells to assist Lin Feng. The old man cast defensive spells on them to ensure their safety.

With the concerted efforts of the four, the shadow demons were eliminated one by one. However, before they could catch their breath, a huge monster came out from the depths. The monster was dozens of feet tall and exuded a powerful aura.

"This is the monster guarding the castle. It is very powerful and we must do our best to deal with it," said the old man.

Lin Feng took a deep breath and rushed towards the monster. The monster waved its huge claws and slapped Lin Feng. Lin Feng dodged sideways and stabbed the monster's eyes with a sword. The monster felt pain and roared, and a stream of flames spewed out of its mouth, sweeping towards Lin Feng.

Seeing this, Amber immediately cast an ice spell to freeze the flames. Li'er cast a healing spell to heal Lin Feng's injuries. The old man was not to be outdone and cast a powerful attack spell to blast the monster.

Under the siege of the four people, the monster gradually lost the upper hand. Finally, Lin Feng found the weakness of the monster and pierced its heart with a sword. The monster fell to the ground with a bang and disappeared into a cloud of smoke.

The four continued to move forward, and deep in the castle, they found a huge treasure house filled with gold, silver, treasures, magic weapons and secret manuals, which was dazzling.

"Finally found the treasure!" Amber said excitedly.

However, Lin Feng shook his head: "Although these treasures are precious, the most important thing for us is the friendship between each other. Without everyone's support, we would not be able to get here."

The old man nodded: "Lin Feng is right, wealth is fleeting, friendship is eternal."

Just as they were about to leave the treasure house, a dark shadow suddenly appeared and pounced towards them.

"It's the owner of the castle!" the old man shouted.

The owner of the castle is a powerful evil wizard, whose strength is unfathomable. The four of them fought a life-and-death battle with the evil wizard. In the battle, Lin Feng was unfortunately seriously injured.

"Lin Feng!" Amber and Li'er shouted anxiously.

"Don't worry about me, just go away!" Lin Feng said loudly.

"No! We will stick together through life and death, and we will never leave you!" Amber and Li'er said firmly.

The old man also said: "That's right, let's fight to the end together!"

With the encouragement of the old man, Amber and Li'er, Lin Feng regained his spirits. The four of them worked closely together and launched a final desperate fight with the evil wizard.

After a fierce battle, they finally defeated the evil wizard. The four of them supported each other and walked out of the castle. The sunlight shone on them, warm and gentle.

"This adventure made me understand more deeply the preciousness of friendship," Lin Feng said with emotion.

"That's right, we are a family. No matter what difficulties we encounter, we will stick together through life and death and never leave each other," said the old man.

The four people held hands tightly together, and their figures gradually faded away in the afterglow of the setting sun, becoming an eternal landscape.