I was reborn as a young master in an invincible family of immortals

Lin Yun and Su Yao stood in the bright passage leading to the underground. Their mood, which had been slightly relaxed by the fresh air and soft light, instantly became tense again as the buzzing sound gradually grew louder.

Lin Yun thought to himself, this Shadow Cult's territory is truly filled with strangeness. Just as he'd found this seemingly safe passage, new troubles had arisen. He couldn't help but think of his family elders, who always remained calm in the face of unknown dangers, relying on their deep family heritage to overcome them. As a descendant of an invincible family, he couldn't bring shame to his family here. He had to overcome this difficulty no matter what.

Although the light in the passageway was bright, the buzzing sound imbued the bright environment with a tense atmosphere. The softly glowing crystals embedded in the walls seemed to tremble slightly, as if sensing the impending danger. The smooth floor of the passageway reflected the crystals' light, yet was cast a shadow by the approaching unknown threat.

"Su Yao, be careful. Who knows what this thing is?" Lin Yun whispered. His voice was steady, but the vigilance in his eyes was undisguised. He slowly poured his spiritual power into the sword, and it suddenly shone with a faint spiritual light, as if preparing for the upcoming battle.

Su Yao nodded, and quickly formed seals with her hands. A thicker spiritual shield emerged around her. She said solemnly, "Well, this doesn't sound good. We have to be very alert."

Before he could finish his words, a group of bizarre creatures sprinted towards him from the front of the tunnel. These creatures resembled giant moths, more than a man's height, with wingspans stretching several feet. Their wings were covered in scales that shimmered with a faint blue light. Each flap of their wings released a shower of blue phosphorus powder, which, illuminated by the tunnel's light, created a dreamlike, yet indescribably eerie atmosphere.

Their heads looked like a huge tumor with countless compound eyes on them. Those compound eyes flashed with a ferocious red light and stared at Lin Yun and Su Yao, as if they were staring at prey that was about to be caught.

"What...what kind of monster is this?" Lin Yun was shocked. He had never seen such a bizarre creature before. There didn't seem to be any similar descriptions in the family records. It seemed that the things the Shadow Cult had created were truly bizarre.

The monsters were extremely fast and rushed to the front in the blink of an eye. They did not attack directly, but circled around Lin Yun and Su Yao. The buzzing sound was deafening and distracting.

Lin Yun attempted to strike one of the moth monsters with his sword, but it was incredibly agile and easily dodged his attack, taking the opportunity to spray a cloud of blue phosphorus powder at him. Lin Yun quickly dodged to the side, only to find that the phosphorus powder, once in contact with the air, transformed into a pungent smoke that stung his eyes and seemed to suppress his spiritual power.

"Su Yao, this phosphorus powder is weird, be careful not to get it on you!" Lin Yun shouted loudly, becoming increasingly anxious. He knew that facing these difficult monsters, he had to find a solution as soon as possible, otherwise they would be exhausted to death here sooner or later.

Su Yao was also trying to cast spells to resist the harassment of the monsters around her. She kept adjusting the strength of her spiritual shield, trying to keep the phosphorus powder and monsters out. However, these monsters were numerous and extremely agile, and her spiritual power was depleted at a very fast rate. Fine beads of sweat were already covering her forehead.

In this tense confrontation, Lin Yun forced himself to calm down and carefully observed the every move of these moth monsters. He knew that panic would only make the situation worse. Only by finding their weaknesses would he have a chance to turn the tide of the battle.

After some observation, Lin Yun discovered that every time these monsters sprinkled phosphorus powder, the faint blue light on their wings would dim briefly, and the frequency of their wing flapping would also slow down slightly, as if a lot of energy was consumed in the process of releasing the phosphorus powder.

"Could this be their weakness?" Lin Yun's heart stirred, and a glimmer of hope flashed in his eyes. He decided to observe for a while longer to confirm his guess.

So, he deliberately made some provocative movements, causing the monsters to circle around him even more frantically, and from time to time he sprinkled phosphorus powder. Sure enough, every time he sprinkled phosphorus powder, the light of the monsters' wings dimmed and the flapping frequency slowed down.

"Su Yao, I seem to have found the weakness of these monsters! After they sprinkle phosphorus powder, the light of their wings will dim and the flapping frequency will slow down. Let's take this opportunity to attack them!" Lin Yun shouted loudly, with a hint of excitement in his voice, as if he saw a ray of hope in this dark and desperate situation.

Su Yao was cheered up when she heard this, and immediately responded: "Okay, Lin Yun, I will cooperate with you to the best of my ability!"

At this moment, although they were in extreme danger, a glimmer of hope ignited in the hearts of both of them, thinking that perhaps they could use this to turn the unfavorable situation of the battle around.

Lin Yun saw the perfect moment. When a moth monster sprinkled phosphorus powder again, and the faint blue light on its wings just dimmed and the flapping frequency began to slow down, he shouted: "Now!"

The sword in his hand shone brightly, and he concentrated all his spiritual power on the tip of the sword, unleashing his strongest strike. This strike, with unstoppable force, slashed precisely at the monster's wings.

At the same time, Su Yao quickly formed seals with her hands, muttered something, and cast an auxiliary spell to enhance the power of the attack, increasing the power of Lin Yun's sword to the extreme.

The tip of the sword precisely slashed through the monster's wing. A dazzling flash of light flashed, followed by a shrill scream. One of the monster's wings was severed. Losing the balance of one wing, the monster tumbled in the air, unable to fly as nimbly as before.

"Success!" Lin Yun and Su Yao shouted in surprise at the same time.

Seeing the effect, the two men gained confidence and continued to attack other monsters using the same method. As more and more monsters were injured by their concentrated attacks, they began to panic and their attack rhythm was disrupted. Although their numbers were still large, their threat was significantly reduced.

Lin Yun and Su Yao gritted their teeth, seized this opportunity, and continued to launch more fierce attacks, finally successfully repelling or destroying most of the monsters. The remaining monsters saw that the situation was not good, and after making a few low buzzing sounds, they fled in panic and disappeared into the depths of the passage.

Lin Yun breathed a sigh of relief, feeling relieved. But he also knew that this was only a temporary solution to the immediate crisis; they were still a long way from truly unraveling all the secrets and finding a way out. He looked at the sword in his hand, then at Su Yao beside him, thinking, "Luckily, she's by my side, otherwise I really don't know what to do this time."

After repelling the moth monsters, Lin Yun and Su Yao continued to walk down the passage. The light in the passage was still bright, but as they went deeper, the surrounding environment seemed to become more mysterious.

After walking for a while, they found some ancient murals on the walls on both sides of the passage. These murals were colorful, and although they had been eroded by time, the content depicted on them could still be clearly seen.

The murals seemed to tell an ancient story, depicting a group of people in bizarre costumes surrounding a massive mountain, upon which stood a mysterious palace. The palace's architecture was unique, with towering towers and vast corridors, all inscribed with intricate runes and patterns.

Amidst the crowd, one figure stood out. It was a man dressed in ornate robes, holding a brilliantly glowing scepter, seemingly presiding over some important ceremony. Those surrounding him, their faces filled with reverence, knelt in worship toward the palace.

"Lin Yun, look at these murals. They seem to be telling a very ancient story. Maybe it is related to the Shadow Cult or the secret of this place." Su Yao stopped and said while looking at the murals carefully.

Lin Yun also walked over. He looked at the murals, and a strong curiosity surged in his heart. He wondered if the content depicted in these murals could be the key to unlocking the secrets here.

"Well, let's take a closer look. Maybe we can find some useful clues from these murals." Lin Yun said.

So, the two of them stopped in front of the murals and began to carefully observe the details of each mural, trying to interpret more information from them.

Lin Yun and Su Yao observed the murals carefully, trying to find clues to unlock the secrets here from these colorful murals.

Lin Yun discovered that on one of the murals, the pattern on the robe of the figure holding a scepter in a gorgeous robe was strikingly similar to some of the ancient clothing of his family. This discovery shocked Lin Yun greatly. He had never expected that in this mysterious place of the Shadow Cult, elements related to his family would appear.

"Su Yao, look at the pattern on this person's robe. It's similar to the patterns on some ancient costumes in my family. What's going on? Is there any connection between my family and this place?" Lin Yun pointed at the figure on the mural and said in surprise.

After hearing this, Su Yao came over to take a closer look, and then said, "Really? This is too strange. Maybe your family has had an intersection with the Shadow Cult or some force in this place before, but what happened later was forgotten."

Lin Yun pondered this inwardly. He recalled the family legends and ancient records, which seemed to have no connection with such a place. However, the mural before him so clearly demonstrated this connection, which made him feel that there must be a deeper meaning behind it.

He carefully examined the other details on the mural again and found that the runes and patterns surrounding the palace also had a sense of déjà vu. He closed his eyes and searched his mind for related family memories. Suddenly, he remembered that he had seen similar runes and patterns in a secret collection of ancient books in his family, but he had not paid much attention to it at the time.

"Su Yao, I seem to remember something. I have seen runes and patterns similar to these murals in the secret ancient books of my family, but I didn't know their specific meaning at the time. Maybe we can find more clues about this place from the records in the ancient books of our family." Lin Yun opened his eyes and said excitedly.

Su Yao nodded and said, "Well, we must study those ancient books carefully when we go back. However, let's first look at these murals to see if we can find any clues that can be used at the moment."

The two continued to explore the mural carefully, not missing any details that might contain clues.

After careful observation and thinking, Lin Yun and Su Yao finally found a potentially useful clue on the mural.

On a mural depicting the interior of the palace, they discovered a small pattern hidden in a corner. This small pattern was a circle with some tiny runes engraved inside. The shape and arrangement of these runes were somewhat similar to the runes they had previously found at the entrance of the passage.

"Lin Yun, look at this small pattern. It is similar to the rune before. Maybe this is the clue for us to move forward." Su Yao said, pointing to the small pattern on the mural.

Lin Yun took a closer look and nodded, saying, "Yes, it does look very similar. Let's try using the same method we used to trigger the entrance rune before, using our spiritual power to touch this small pattern and see if we can find anything."

Lin Yun took a deep breath, and then, following his previous experience, carefully used his spiritual power to touch the small pattern on the mural. When his spiritual power touched the small pattern, the mural suddenly flashed with a dazzling light. Some images seemed to flow in the light, as if displaying some important information.

But before they could see the specific content of the images, a dull roar suddenly sounded in the passage, and then the ground began to shake violently, as if an earthquake was about to come.

"Oh no, what's going on?" Lin Yun shouted loudly. He hurriedly stabilized his body and at the same time poured spiritual power into the sword and Su Yao's spiritual shield, trying to enhance their defensive capabilities.

Su Yao was also trying hard to maintain the shield. Her face was a little pale, but her eyes were still firm.