Genshin Impact.

Under the guidance of the old man, Lin Feng and Li Er began their journey to the mortal world to experience tribulations, which was crucial to their immortal journey. After many twists and turns, the two came to a mysterious valley.

The valley was filled with mist, and the surroundings were eerily quiet. Lin Feng looked around vigilantly, the fairy sword in his hand flickering with a faint light. Li'er followed closely beside him, her face also full of vigilance.

"Brother Feng, it feels so eerie here, we must be careful." Li'er said softly.

Lin Feng nodded and comforted her: "Don't be afraid, I'm here."

At this moment, a sinister laugh suddenly came from the valley, and the laugh echoed in the valley, making people shudder. Then, a series of black shadows rushed out of the mist and pounced on Lin Feng and Li'er.

Lin Feng immediately swung his sword to meet the enemy, the sword dancing in his hand, drawing brilliant rays of light. Li'er also used her own magic to engage in a fierce battle with the shadows.

However, those shadows seemed endless, coming in waves. Gradually, Lin Feng and Li Er began to feel powerless. Just when they were about to collapse, a beam of light descended from the sky and instantly dispersed those shadows.

The light faded away, and a mysterious old man appeared in front of them. The old man looked at them with a hint of admiration in his eyes.

"You two performed well in this battle, but this is only the beginning of your mental tribulation. Next, you will face even more severe tests," the old man said slowly.

Lin Feng and Li'er looked at each other, their eyes filled with determination.

"Senior, we are ready, please start." Lin Feng said.

The old man nodded and formed a seal with his hands. The seal flashed with light and instantly enveloped Lin Feng and Li'er.

When the light disappeared, Lin Feng and Li Er found themselves in a strange world. In this world, people lived ordinary lives, without magic and fighting.

Lin Feng and Li Er became ordinary villagers here. They needed to live here for a while and experience the joys and sorrows of ordinary people. At first, they were a little uncomfortable with this kind of life, but as time went by, they gradually integrated into this world.

In this world, Lin Feng and Li'er worked together and helped the villagers solve problems. In their ordinary lives, they gradually realized some insights they had never had before.

However, the good times did not last long. One day, a group of bandits suddenly came to the village. They burned, killed, looted, and committed all kinds of evil. Seeing the villagers suffering, Lin Feng and Li Er were filled with anger.

They decided to stand up and protect the villagers. Although they could not use magic, they fought a desperate battle with the robbers with their wisdom and courage.

During the battle, Lin Feng and Li Er were in danger many times, but they never gave up. In the end, they successfully drove away the robbers and protected the village.

After this battle, Lin Feng and Li Er's mental state was greatly improved. They understood that strength is not only used to pursue the immortal path, but also to protect those important people and things.

Just when they thought their mental tribulation was over, a greater test came. A plague suddenly broke out in the village, and many villagers were infected with the disease and were in critical condition.

Lin Feng and Li Er searched for a cure for the plague, working tirelessly day and night. In the process, they encountered many difficulties and setbacks, but they never gave up.

Finally, they found a hermit doctor, with the help of the doctor, they successfully developed a medicine to cure the villagers' diseases.

After this series of tests, Lin Feng and Li Er's character has been greatly tempered. Their state of mind has become more resolute, and their understanding of the immortal path has become deeper.

When they returned to the old man again, he smiled with satisfaction.

"You have passed the test of the heart tribulation, and you have gained a lot from this tribulation. I believe that you will be able to go further in your future journey to immortality." said the old man.

Lin Feng and Li'er smiled at each other. They knew that this descent to the mortal world to endure hardships would be the most precious experience in their journey to immortality.