Genshin Impact.

Lin Feng and his companions went deep into this mysterious and dangerous secret place, and after going through many hardships and obstacles, they finally came to a desolate land. The surrounding area was filled with thick fog, making it difficult to tell the direction.

"This place is very strange, so everyone should be careful." The old man looked solemn, and the staff in his hand flickered with a faint light.

Lin Feng held the sword tightly in his hand, observing the surroundings with vigilant eyes. Amber also put the bow on the string, ready to deal with any sudden danger. Li'er followed Lin Feng obediently. Although she was still young, she gradually grew up during this adventure.

Suddenly, a gust of wind blew past, dispersing some of the fog, and an ancient castle appeared in front of them. The walls of the castle were covered with vines, and the gate was closed, revealing a gloomy atmosphere.

"This castle doesn't look simple. Maybe it contains the clues we need." Lin Feng said.

The crowd approached the castle cautiously. When they just walked to the gate, it slowly opened and a pungent smell of blood hit them. After they entered the castle, they found that there was no one inside, only the torches on the wall flickered with strange lights.

"What is this place? It feels so scary." Li'er grabbed the corner of Lin Feng's clothes with some fear.

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

At this moment, a low roar suddenly came from all around, and then a group of monsters rushed out from the shadows and pounced on them. These monsters had different shapes, some had sharp claws, some breathed fire, and some could release powerful magic.

Upon seeing this, the old man immediately waved his staff and released a powerful magic barrier to protect everyone. "These monsters are quite powerful, everyone be careful!"

Lin Feng flashed and rushed into the group of monsters, waving his sword, and instantly killed several monsters. Amber was not to be outdone, she drew her bow and shot arrows, and each arrow hit the monster's vital point accurately.

However, the number of monsters increased, as if endless. Gradually, they began to fall into trouble, and the old man's magic barrier became shaky under the monsters' attacks.

"This is not a solution. We must find the monster's weakness before we can break through the siege." Lin Feng said while fighting.

Just as they were struggling to hold on, Li'er suddenly discovered a mural on the wall. The mural depicted a mysterious rune, and she thought the rune might be related to monsters.

"Brother Lin Feng, look at that mural!" Li'er shouted.

Lin Feng followed Li'er's gaze and saw the mural. He immediately realized that this rune might be the key to breaking the monster's siege. He struggled to get rid of the monsters around him and rushed to the mural.

Just as Lin Feng was about to approach the mural, a powerful monster suddenly appeared and blocked his way. This monster was huge in size and exuded a powerful aura.

Lin Feng was not afraid and fought a desperate battle with the monster. After a fierce battle, Lin Feng finally found the monster's weakness and stabbed it in the vital part with a sword. The monster fell to the ground with a bang and turned into a cloud of smoke.

Lin Feng successfully came to the mural and studied the rune carefully. After some thought, he finally understood the meaning of the rune. He inserted his sword into the ground, formed seals with his hands, and muttered something.

As Lin Feng's spell sounded, a dazzling light emanated from the sword, which turned into countless rays of light and shot towards the monsters around. After the monsters came into contact with the light, they howled in pain and then turned into ashes.

The crowd finally got rid of the monsters' siege and they breathed a sigh of relief. However, they knew that this was just the beginning of the adventure and there were many unknown dangers hidden in this castle.

"Let's move on and see what secrets are hidden in this castle." Lin Feng said.

The group continued to move forward along the passage of the castle, moving cautiously along the way. They came to a huge hall, in the center of which stood a huge sarcophagus.

"This sarcophagus looks a bit strange, everyone be careful," the old man warned.

Lin Feng slowly approached the sarcophagus. When he got in front of it, it suddenly trembled violently, and then slowly opened. A strong evil aura surged out of the sarcophagus, and a figure shrouded in darkness slowly rose from the sarcophagus.

"You ants, how dare you trespass into my territory? Today is the day you die!" The black shadow let out a low roar.

Lin Feng and others are on high alert, and a more intense battle is about to begin...