Genshin Impact.

Lin Feng stood on the top of a barren mountain, the wind whistling through his hair and the corners of his clothes rustling. His eyes were deep and firm as he looked at the rolling mountains in the distance, with a myriad of thoughts in his mind.

Beside him, an old man had his hands behind his back, his eyes revealing worry and contemplation. Amber and Li'er behind him also had solemn expressions, and the atmosphere was so depressing that it made people breathless.

"This crisis is more serious than we imagined." The old man broke the silence, his voice hoarse and heavy, "The dark forces seem to be well prepared. Their power is strong and strange. We must find a countermeasure as soon as possible."

Lin Feng nodded slightly, knowing full well that what the old man said was true. During this period of time, they had encountered a series of strange attacks and traps. The enemy was in the dark, and they were in the light. Every step was like walking on thin ice.

"But we know too little about the enemy." Amber frowned and said, "We know nothing about their purpose, origin, and strength distribution. How can we formulate a strategy?"

Li Er bit her lip lightly, with a stubborn light flashing in her eyes: "No matter what, we can't just sit there and wait for death. We must find clues and uncover the enemy."

Lin Feng took a deep breath and said slowly: "From the current situation, the enemy's actions seem to have a certain pattern. Every time they attack, they choose to attack our must-pass roads or important strongholds, which means that they know our actions very well. We may have spies among us."

"Spy?" Amber's eyes widened. "How is this possible? Our team has been strictly screened and tested. How could there be a spy infiltrated?"

Lin Feng shook his head: "I don't want to believe it either, but this is the most reasonable explanation at the moment. We must investigate secretly and find this spy, otherwise our every move will be under the control of the enemy and we will have no chance of winning."

The old man pondered for a moment and said, "Lin Feng has a point. However, while investigating the spy, we cannot ignore the improvement of our own strength. The enemy is more powerful than we can imagine. We must break through the bottleneck as soon as possible and improve our cultivation."

Everyone nodded in agreement. So, they decided to act separately. Lin Feng was responsible for investigating the spy, while the old man led Amber and Li'er to practice in seclusion to improve their strength.

Lin Feng began to secretly observe everyone in the team. He quietly paid attention to everyone's words and deeds, daily activities and contacts with the outside world. However, after several days of investigation, he did not find any suspicious signs.

Just when Lin Feng was in trouble, he found a clue by chance. One night, he accidentally saw a figure sneaking out of the camp and walking towards the depths of the forest. Lin Feng was moved and followed quietly.

Following the figure, Lin Feng came to a hidden cave. After the man entered the cave, he met a mysterious man in black. Lin Feng hid in the dark, used his skills, and listened carefully to their conversation.

"How are things going?" asked the man in black.

"Everything is going according to plan. They haven't discovered my identity yet," the man replied.

"Very good. Continue to lurk and report their movements to me at any time. When the time is right, we will give them a fatal blow." The man in black said coldly.

Lin Feng was furious when he heard this. He wanted to rush up and tear the two traitors into pieces. But he knew that it was not the right time yet. He quietly retreated and decided to go back and tell the old man about this.

Back at the camp, Lin Feng told the old man, Amber and Li'er about his discovery. After hearing this, everyone was filled with indignation.

"I didn't expect it to be him!" Amber gritted her teeth and said, "I must kill this traitor with my own hands!"

The old man waved his hand and said, "Don't be impulsive. We can't alert the enemy yet. Now that we know the identity of the spy, we can use this to formulate a counter-plan."

After some discussion, they decided to use the enemy's trick. They deliberately leaked some false information to the spy to make the enemy make a wrong judgment. At the same time, they also secretly set traps and waited for the enemy to take the bait.

A few days later, the enemy really acted according to the information they leaked. When the enemy stepped into the trap they set, Lin Feng and others immediately launched an attack. For a moment, shouts of killing shook the sky and magic lights shone.

The enemy was caught off guard and suffered heavy casualties. But they were strong after all, and soon stabilized their position and began to organize a counterattack. The two sides launched a fierce battle.

Lin Feng held a long sword and shuttled through the enemy group like a ghost, and each sword brought a string of blood. The old man cast a powerful spell and knocked down the enemies in groups. Amber and Li'er were not to be outdone. They cooperated with each other and fought bravely.

After a bloody battle, they finally succeeded in repelling the enemy. However, they also paid a heavy price. Many companions died in the battle, and Lin Feng was also seriously injured.

After the battle, they sat on the ground exhausted, looking at the corpses all over the ground, their hearts filled with sadness and anger.

"Although we have won this victory, the enemy will not give up. Next time, we must be more careful," said the old man.

Lin Feng nodded, with a determined light in his eyes: "Don't worry, we will be prepared. No matter how big the difficulties are, we will not back down."

In the following days, Lin Feng and his companions continued to strengthen their training while recovering from their injuries, while also keeping a close eye on the enemy's movements. They knew that greater challenges were still to come, but they were ready to face everything...