Weird, this is the first feeling after Ranger Ruth entered the underground world, he is obviously underground now, but he has not seen any fluorescent moss, in front of him, there is a lifeless underground world, which is completely inconsistent with his past experience in the underground world.

Such a strange scene made him wonder if he was calculated by the royal family, but this was also a fleeting thought, the reason why he wanted to come to the underground world was also his own purpose, as long as this purpose could be achieved, no matter how much it cost, he could bear it.

For Ruth, in addition to being a Black Dragon-level adventurer, he also has another layer of identity, that is, he is the only heir to the legendary Sword Saint on the continent.

In the distant past, this legendary sword master once fought side by side with many human powerhouses, and together sealed the evil demonic beasts that tried to destroy the world, but the seal also came at a price, and the sword master used his life and the holy sword at the cost of the sword, and after a brutal battle, he finally sealed the demonic beast under the holy sword that turned into a big tree.

The Sword Master left very suddenly, and only came to pass on part of his swordsmanship to his daughter, and left this world forever.

Fortunately, the sword saint's daughter and his wife are also swordsman geniuses, after hard work and attempts, finally restored most of the sword skills used by the sword saint during his lifetime, since then, this restored sword art has been passed down in the sword saint's family, and those who learn swordsmanship will select the eldest child in the next generation to inherit the swordsmanship, whether this person is male or female.

In this way, the sword master's swordsmanship was passed down in a single line, and it was passed down to Ruth.

Ruth himself is actually a descendant of the Juggernaut, he has been working as a mercenary before, and because of the needs of the mission, he also has the identity of an adventurer in the Ironheart Adventurer Association.

One day just a year ago, an incident completely changed his life, Ruth remembered that it was an ordinary evening, he had just finished a day's mission, he was drinking in the tavern, and the mercenary was paid very well, but Ruth still liked to drink this kind of low-quality dwarven beer in ordinary taverns, because it reminded him of the time when he was a rookie, and the crude dwarven beer had accompanied him through many unpleasant days at that time.

As he drank, a magical throbbing suddenly came from Ruth's heart, a consciousness, or rather a voice, that made him feel very familiar, calling him to the extreme south of the human world, where some kind of mission awaited him.

This is a world of elements and magic, cultivators often trust intuition and whims, after Ruth felt this in his heart, he immediately decided to give up his rich mercenary life and became a free adventurer, and with his superb swordsmanship, he completed many high-level tasks, and soon became a black dragon-level adventurer.

The reason why Ruth chose to give up his job as a mercenary and choose to become an adventurer is because the adventurer's organization is not as strict as that of a mercenary, and his personal actions are more free, and he can get more information.

After becoming a Black Dragon-level adventurer, Ruth originally planned to go directly to Hesse City in the extreme south, but he didn't expect that a cult rebellion had broken out there recently, so Ruth continued to stay in Eagle City, the capital of the empire, planning to wait for the situation in the extreme south to stabilize a little before making plans.

During the time he lived in Eagle City, Ruth had been feeling that magical feeling had been intermittently transmitted to his heart, and not long ago, he sensed that his target had actually reached the underground world, and he was worried about how to enter the underground world, and he happened to hear about the royal underground search mission, so he managed to get the recommendation of the Ironheart Adventurers Association and became a member of the royal investigation team.

Thinking of this, Ruth couldn't help but touch the scabbard on his waist, the scabbard contained a cylindrical black sword, which was Ruth's only weapon, according to her mother, this sword was made by imitating the holy sword used by the Sword Master, this sword has no blade, and Ruth doesn't need a blade when he uses it to attack, as long as the sword qi is released on the cylindrical sword, he can create a qi blade in any direction, this kind of air blade has no trace, and ordinary people have no way to defend it at all.

"It's strange why I'm in such a bad state today? I shouldn't be distracted" Ruth shook his head, and at the same time withdrew his attention, focusing on the exploration in front of him, if his understanding of the underground world is not wrong, this should be a very dangerous area, there may be goblins, porcupines, giant spiders and other monsters lurking in the shadows, he must always pay attention to the enemy, and the exploration work is always in danger, and there is no room for the slightest sloppiness and carelessness. Ruth had just been distracted, which proved that his mind had not yet been focused on the task at hand.

"No matter what kind of enemy Juggernaut faces, he will always do his best. Ruth silently recited in his heart, this sentence was the deeds of the Sword Master told him by his mother, and Ruth understood that the Sword Master would never underestimate his enemies, and he must not underestimate this mission.

After meditating a few times, Ruth felt that his previous divergent mind had recovered a lot, and he stopped thinking about those messy things, focused on the exploration task in front of him, picked up the oil lamp, and continued to walk into the depths.

Since entering the mine, the five people in the Royal Investigation Team have been separated, they are the most powerful part of the Mercenary Association and the Adventurer Association, if they deal with it properly, in terms of their strength, they can completely protect themselves in the underground world alone, so they chose to act alone more efficiently.

These five people are all very powerful bosses, some people are used to fighting alone, and they are not interested in teamwork, in short, for various reasons, these five people are separated, each for their own interests, in different directions, with their own way of investigation.

"The materials prepared before are completely useless" Ruth sighed, in order to be able to communicate with these fellow travelers from other forces, but after reading a lot of information about them, he didn't expect that these "big guys" were so arrogant and withdrawn, and they didn't have the habit of teaming up with others at all, but it didn't matter, he had experience and strength, even if he encountered some danger, he could deal with it alone.

"What is this fog" Ruth had been walking deep into the cave for a long time, and was surprised to find that there was a trace of gray fog visible to the naked eye in the air, he quickly put down the oil lamp, took out paper and pen, and marked the location of the gray fog on the map he had drawn all the way.