Genshin Impact.

Lin Feng, Li'er and the mysterious old man were already in an extremely dangerous situation in this trial area. The strange fog that permeated the surroundings blocked their sight tightly, and the unknown threat hidden in the dark was like a hanging sharp blade that could be cut down at any time.

Lin Feng held the sword tightly in his hand, his eyes revealing determination and vigilance. He knew that in this dangerous trial, if he was not careful, he would be doomed. Li'er beside him had a solemn expression, and the magic weapon in his hand flashed a faint light, trying to illuminate the way ahead for them.

"Be careful, there must be something fishy in this fog." The old man warned in a low voice, his eyes constantly scanning the surroundings, trying to find a clue.

Suddenly, a gust of wind blew past, blowing away some of the fog. In that brief moment, they saw a group of distorted monsters appearing in front of them. These monsters were baring their fangs and claws, rushing towards them.

Lin Feng did not hesitate at all and raised his sword to meet the attack. The sword flashed a cold light in the air and instantly slashed at the monster in the front. However, the monster's body was as hard as iron, and Lin Feng's sword only left a shallow mark on its body.

Seeing this, Li Er waved the magic weapon in her hand, and a beam of light shot towards the monster. After the light hit the monster, there was a dull sound, but the monster did not fall down, instead it pounced on it even more frantically.

The old man formed seals with his hands and muttered something. A powerful spell flew out from his hands and turned into a flame, enveloping the surrounding monsters. Under the burning flames, the monsters howled in pain, but they did not retreat and continued to come.

As the battle continued, Lin Feng and his companions gradually lost their strength. The monsters seized the opportunity and launched a more fierce attack. Lin Feng was hit by a monster and flew backwards, falling heavily to the ground.

"Lin Feng!" Li'er exclaimed and wanted to go over to check Lin Feng's injuries, but she was entangled by the monsters and couldn't get away.

Lin Feng struggled to get up from the ground, with a trace of blood flowing from the corner of his mouth. He looked at the battle in front of him, and despair surged in his heart. But he knew that he couldn't give up like this, otherwise they would all die here.

At this moment, a flash of inspiration suddenly came to Lin Feng's mind. He remembered a mysterious magic spell he had learned during his training, and thought he might give it a try.

Lin Feng took a deep breath, endured the pain, and began to circulate the magic power in his body. A powerful aura gradually emanated from his body, and the sword in his hand began to flash with a strange light.

"The Mysterious Sect of Heaven and Earth, the origin of all energy. Practice for billions of kalpas to prove my supernatural powers." Lin Feng chanted a spell and swung the sword in his hand. A powerful sword energy slashed towards the monsters.

Wherever the sword energy passed, the monsters were cut in half. Li'er and the old man were overjoyed to see Lin Feng perform such a powerful spell, and they also increased the intensity of their attacks.

With the concerted efforts of the three, the monsters' offensive was finally contained. Gradually, the monsters began to retreat and disappeared into the mist.

However, before they could breathe a sigh of relief, the fog around them suddenly became thicker, and a powerful pressure came from all directions.

"No, this is the power of the formation!" The old man's face changed, "We must find the center of the formation as soon as possible, otherwise we will be trapped by this formation."

Lin Feng nodded, and the three of them began to search for the center of the formation in the fog. They moved forward carefully, not missing any suspicious places.

Finally, after some searching, Lin Feng found a place emitting a faint light.

"That should be the center of the formation." Lin Feng said, pointing at the light.

The three of them quickly walked towards the direction of the light. When they got closer, they saw a huge stone tablet standing there, with strange runes engraved on it.

"This is the center of the formation." The old man said, "We must destroy this stone tablet to break the formation."

Without saying anything, Lin Feng raised his sword and slashed at the stone tablet. However, the moment the sword touched the stone tablet, a strong rebound force knocked Lin Feng away.

Li'er and the old man also cast spells to attack the stone tablet, but none of them had any effect.

"What should we do? We can't break the core of the formation." Li'er said anxiously.

Lin Feng stood up, wiped the blood from the corner of his mouth, and there was a hint of determination in his eyes.

"Since conventional methods don't work, we can only use that trick." Lin Feng said.

"Which move?" Li'er and the old man asked.

"Sacrifice the sword with blood!" Lin Feng gritted his teeth and said.

"No, sacrificing blood to the sword is too dangerous. If you are not careful, your life will be in danger." Li'er objected.

"There is no other way now, we can only give it a try." Lin Feng said.

After saying that, Lin Feng cut his palm and dripped blood onto the sword. After the sword absorbed Lin Feng's blood, it emitted a dazzling light.

Lin Feng raised his sword again and slashed at the stone tablet. This time, the sword did not bounce back, but penetrated deeply into the stone tablet.

The runes on the stone tablet began to flicker, emitting rays of light. Then, with a loud bang, the stone tablet exploded, and the surrounding fog quickly dissipated.

"Success!" Li'er and the old man said excitedly.

Lin Feng collapsed on the ground exhausted, with a smile on his face.

Just when they thought the crisis was over, a black crack suddenly appeared in the sky. A strong suction force came from the crack and sucked them in.

When they opened their eyes again, they found themselves in a strange place, surrounded by a barren desert with no sign of life.

"Where is this?" Li'er asked.

The old man frowned and said, "I don't know either, but this place is full of dangers. We must be careful."

At this moment, a low roar was heard in the distance. The three looked in the direction of the sound and saw a huge scorpion emerging from the desert.

The scorpion's body was gleaming with black light, and its eyes revealed a cruel light. It rushed towards them, waving its huge pincers.

Lin Feng and his men were once again caught up in a battle...