Genshin Impact.

Lin Feng and Li Er followed the mysterious old man to the mortal world to experience the tribulations. After experiencing some twists and turns, they gradually adapted to life in the mortal world. However, for them, the road to tribulations has just begun.

One day, the three of them accidentally discovered a mysterious entrance in a quiet valley. The entrance was filled with a faint fairy mist, which vaguely revealed a mysterious atmosphere. The old man stared at them and whispered, "This may be where our opportunity lies."

Lin Feng and Li'er looked at each other, a hint of anticipation flashed in their eyes, and then they followed the old man into the mysterious entrance.

Entering it, they seemed to have come to a whole new world. Surrounded by green mountains and clear waters, the air was filled with rich spiritual energy, exotic flowers and plants were everywhere, and in the distance there were ancient buildings looming.

"Be careful, this place looks peaceful, but it actually hides mysteries." The old man warned.

Lin Feng and Li'er nodded and walked forward cautiously. They walked along a winding path and soon came to an ancient palace. The palace door was closed, but the light shining through the crack in the door made people feel that there must be treasures inside.

Lin Feng stepped forward and gently pushed the door, but found that it did not move at all. Seeing this, Li'er gathered a stream of immortal power in her hand and blasted it towards the door. However, the moment the immortal power touched the door, it dissipated into nothingness.

"Don't be impulsive." The old man walked forward and carefully observed the patterns on the door. "There is a restriction engraved on it. We need to find a way to break it."

The three began to look for clues around the gate. Not long after, Lin Feng found some strange symbols on a stone pillar nearby. The old man went forward to check, and after thinking for a moment, he began to form seals with his hands, and injected immortal power into those symbols.

As the immortal power was injected, the door slowly opened, and a strong breath rushed in. They walked into the palace, and saw all kinds of precious magic weapons and elixirs placed in the palace, and some ancient immortal secret books were engraved on the walls.

Lin Feng excitedly wanted to go forward to take the treasure, but was stopped by the old man: "Don't worry, these treasures are protected by restrictions. If you act rashly, you will only be in danger."

At this moment, a low roar suddenly sounded in the palace. A huge monster rushed out from the darkness, pouncing towards them with its fangs and claws bared. The monster exuded a powerful aura and was obviously not easy to deal with.

The old man flashed and stood in front of Lin Feng and Li'er. A cane appeared in his hand and he swung it towards the monster. A bright light burst out from the cane and collided with the monster.

Lin Feng and Li Er were not to be outdone, and they used their own magic to fight the monster together with the old man. For a moment, the palace was full of light and magic power.

After a fierce battle, they finally defeated the monster. However, before they could breathe a sigh of relief, countless runes suddenly appeared on the walls around them, trapping them inside.

"This is a formation." The old man said solemnly, "It seems that we have triggered the mechanism in the palace."

Lin Feng and Li Er began to try to crack the formation. They continued to use magic to try to find the flaws in the formation. However, the formation was too powerful and their efforts did not achieve much effect.

Just when they were in trouble, Lin Feng suddenly found a jade pendant on his body flashing with a strange light. He took out the jade pendant with an idea.

As soon as the jade pendant appeared, it released a powerful force to counter the formation. With the help of the jade pendant, they finally found the flaw in the formation and successfully cracked it.

After breaking the formation, they began to collect the treasures in the palace. Lin Feng got a powerful magic weapon, Li Er got a precious immortal secret book, and the old man also got a pill.

"We have gained a lot this time, but we can't stay here for long," said the old man.

The three of them left the palace with the treasure and continued to explore this secret realm of immortality. In the following days, they encountered many challenges and opportunities.

In a mysterious valley, they found a spiritual spring. The water of the spiritual spring contained rich spiritual energy, and drinking it could improve one's cultivation. However, there was a powerful guardian beast beside the spiritual spring.

After a hard battle, they successfully defeated the guardian beast and gained the right to use the spiritual spring. Lin Feng and Li'er soaked in the spiritual spring for cultivation, and their cultivation was greatly improved.

In an ancient ruin, they found a mysterious stone tablet. On the stone tablet were some ancient characters, which recorded a powerful magic. After studying it, the old man passed this magic to Lin Feng and Li Er.

As time went by, they gained more and more in the Immortal Fate Secret Realm, and their cultivation became stronger and stronger. However, they also knew that the road to tribulation was still long, and there were more challenges waiting for them in the future.

During one of their explorations, they accidentally discovered a passage leading to another world. The passage was emitting a mysterious light, which filled people with curiosity.

"Where does this passage lead to?" Li'er asked.

The old man shook his head: "I don't know either, but since it has appeared, perhaps it is our chance."

A hint of determination flashed in Lin Feng's eyes: "Then let's go in and take a look."

The three of them stepped into the passage and disappeared in the light. What awaited them was an unknown fate...