Genshin Impact.

Lin Feng looked at the old man in front of him, his heart full of doubts and uneasiness. The old man's eyes were deep and mysterious, as if he knew all the answers to this life and death mystery.

"Senior, is there a solution to this puzzle?" Lin Feng asked anxiously.

The old man stroked his beard and shook his head slightly: "This situation is extremely dangerous, but it is not without a clue. It just requires a huge price to pay."

Amber held the sword tightly at the side, with a firm look in his eyes: "As long as we can break the deadlock, we are willing to bear any price."

Li'er also nodded slightly, with a look of determination in her eyes: "Yes, please let me know."

The old man pondered for a moment and said slowly: "This life and death mystery is set up by a powerful evil force, whose purpose is to absorb your vitality and enhance their own skills. To break the situation, we must find the source of this evil force and completely eliminate it."

Lin Feng frowned: "But how can we find the source?"

The old man smiled and said, "We need to start with the clues in this puzzle. Think carefully about the various abnormal phenomena you encountered after entering this puzzle. Perhaps the key to the source is hidden in them."

Everyone fell into deep thought and began to recall every detail of what happened after entering the mystery.

Suddenly, Lin Feng's eyes lit up: "I remember seeing a strange light in a foggy valley. It flashed and disappeared. Maybe that's the clue we are looking for."

The old man nodded: "Then let's go to that valley and find out what's going on."

Everyone immediately set off and headed towards the valley. Along the way, they were cautious and alert to possible dangers around them.

Finally, they arrived at the valley, which was filled with thick fog, making it difficult to see the road ahead.

Lin Feng walked cautiously in front, holding the sword tightly in his hand. Amber and Li'er followed closely behind, and the old man was at the back, escorting them.

Suddenly, a sinister laugh sounded in the valley: "Haha, you are finally here."

Everyone was startled, and saw a dark figure slowly walking out of the mist. The figure of the dark figure was blurry, and only a pair of eyes flashing red light could be seen.

"Are you the mastermind behind this life and death mystery?" Lin Feng asked angrily.

The shadow sneered: "That's right, since you have entered my puzzle, don't even think about getting out alive."

After saying that, the black shadow raised his hand and waved it, and a powerful black energy attacked everyone.

The old man shouted, "Everyone be careful!" Then he flew forward, and a white light condensed in his hand, colliding with the black energy.

There was a loud "bang" and a burst of light. The old man and the black shadow each took a few steps back.

"What a powerful strength." Amber exclaimed.

Lin Feng gritted his teeth and said, "If we fight together, we will definitely be able to defeat him."

Everyone used their unique skills to attack the black shadow. The black shadow was not to be outdone and started a fierce battle with them.

During the battle, Lin Feng discovered that although the black shadow was powerful, his movements seemed to be restricted in some way.

"Everyone, pay attention, his weak point may be his back." Lin Feng shouted loudly.

Upon hearing this, everyone changed the direction of their attack and attacked the black shadow's back.

The shadow sensed their intention and tried to dodge, but it was too late. Amber's sword pierced the shadow's back, and the shadow let out a scream.

The old man took the opportunity to cast a powerful spell, completely covering the black shadow. The black shadow struggled for a moment in the light of the spell, then turned into a wisp of black smoke and disappeared.

As the shadow disappeared, the fog in the valley gradually dissipated, and everyone discovered that there was an ancient palace deep in the valley.

"Perhaps this palace is the source of evil power." said the old man.

When they walked into the palace, they saw that it was filled with all kinds of strange runes and patterns. In the center of the palace, there was a huge black crystal ball.

"This should be the key to controlling the mystery of life and death." Lin Feng said.

The old man nodded: "We must destroy this crystal ball to completely break the impasse."

Everyone used their strongest attacks and attacked the crystal ball. Under the attacks of everyone, cracks began to appear on the crystal ball.

With a "crack", the crystal ball finally shattered. A beam of light shot out from the crystal ball, illuminating the entire palace.

As the crystal ball shattered, the mystery of life and death was completely solved, and everyone finally breathed a sigh of relief.

"It's finally over." Li'er said tiredly.

The old man smiled and said, "Although this crisis has been resolved, there will be more challenges waiting for us in the future. We must continue to improve our strength in order to better protect this world."

Everyone nodded, their eyes full of determination.