At night, the whole sky is as deep as water, and there is only one moonless day in March and one day in August every year, which is also the day for the whole continent to pay tribute to the souls of the dead.

It was August, and the entire continent had already entered the midsummer season, especially the territory of the Demon Martial Empire near the south, and it was even more sultry at the moment.

According to Long Xingyu's estimate, the Demon Martial Empire should be near the equator of this planet. Further south there is a vast uninhabited territory, and there is a desert world.

There have been historical records that the desert did not exist 10,000 years ago, when various races were scattered across the continent, and each race had its own gods. At that time, the south was ruled by a mysterious race, and the south was a vast rainforest.

Later, for unknown reasons, gods and demons descended into this world and, without warning, joined forces to slaughter the races that inhabited that land. Today's sand sea is left over from the war between the gods and demons and that race in ancient times.

It was a battlefield, a world infested with blood. The original rainforest also gradually died out after the disappearance of that mysterious race. Later, for some unknown reason, the land of the sand sea was blocked by a strange energy. To the south of that energy barrier is a vast sea of sand, which can reach a high temperature of nearly 70 degrees Celsius during the day, and at night, it can drop to minus 8 or 90 degrees. To the north of the barrier is the southern border of what is now the Demon Empire, which is very suitable for human existence, and there is only one border city "Arumia". And it, because of its proximity to the "Southern Xinjiang Sand Sea", has also become a paradise for adventurers.

Although the sand sea is no longer suitable for ordinary human life, it still cannot stop adventurers from exploring, perhaps for the battle relics of ancient times, perhaps to find the ruins of the civilization of the vanished race, or to hunt for the sharon that can only be found in the sand sea.

This salon is a treasure all over the body, and because it has the blood of the dragons, it is their blood that is the best raw material for making scrolls. The defense of the salon itself is very impressive, because their skin is often used to make leather armor or inner armor, and their sinews are also used to make bowstrings, their teeth and claws can be used to make weapons, and their flesh is also very tender, which is a high-class ingredient sought after by the aristocracy of all countries.

In addition to the salon, in the heart of the sand sea, there is also a strange plant called "Purple Night Shadow", which is a shrub that is woody, with curly leaves, wavy round teeth on the edges, long above the surface, and cold. Unlike epiphyllum flowers on Earth, they love frost and are not afraid of the sun. During the day, they are like withered grass roots, but after sunset, when the temperature plummets to about minus 40 degrees, they will stand up and stretch again, and every time the sky disappears, the night sky of the entire sand sea will have a hint of purple, and at this time, the "purple night and gloom" will also bloom with purple fluorescent flowers. Moreover, this "Purple Night Gloom", also known as the "Gift of the Elven Goddess", is the main ingredient in the preparation of a type called "Eternal Potion".

This "eternal potion" is said to be a gift left by the elf goddess to the elf clan back then, and the potion possessed by this potion can keep the creature's ** ability at its peak, that is, when it is the most powerful, and at the same time, anyone who has used this potion will also remain young forever. Not only that, but this potion can also maximize the vitality of the organism, and in general, it can more than double the lifespan of the organism. In addition, this potion also has the ability to bring the dead back to life, and it is said that as long as there is still a breath, it can save people.

Later, by chance, a human god-level thief infiltrated the elven world, stole the recipe of the potion from the elves, and gave it to one of his friends, the alchemist. His alchemist friend studied hard and found that the main ingredient was missing, the Purple Night Shadow, so the thief went to find the Purple Night Shadow, but eventually disappeared into the Southern Sand Sea.

Knowing that this recipe was a hot potato, the alchemist was also afraid that the elves would find him to retaliate, so he took out the recipe at a grandmaster-level alchemist conference, and studied it with those alchemists, dragging the others into the water at the same time, it was also to find a substitute for the main raw material. However, in the end, it was found that "Purple Night Gloom" could not be replaced.

After this incident, the "Eternal Potion" also became known to everyone, and now the human race of the entire continent began to go crazy. Fearing that they would be attacked by the people, the alchemists came up with a way to let the wind go and let the masters of the continent find the materials for them, and they could prepare this potion for them on the basis of collecting double the materials. Since then, for things like the Eternal Potion, there have been more adventurers who set foot in southern Xinjiang every year.

In short, there are no less than 100,000 adventurers who enter Erumia every year. And most of them are above the sixth level, and even saint-level masters will often appear.

However, it is not so easy to survive in the sea of sand, in addition to the attacks of powerful monsters in various deserts, there are often natural disasters such as sandstorms and tornadoes, even if god-level masters encounter these situations, they may not be able to get out alive. Therefore, the average person will not go deeper than 200 kilometers at most.

In any case, the "Southern Sand Sea", known as one of the most dangerous areas on the mainland, is the existence of the Five Peerless Regions, along with the "East China Sea Red Flame", the "Arctic Ice Field", the "Western Desolate Demon Cave" and the "Divine Mountain" in the center of the "West Pole Mountains".

And the vicious and cruel environment of the Sand Sea is the southern frontier of the Demon Martial Empire, and there are no soldiers guarding it, because it is completely unnecessary. The existence of the dangerous southern sand sea is equivalent to having the most powerful natural defense. If other countries wanted to make a detour to the southern frontier to attack the Demon Empire, they would inevitably need to cross the center of the Sand Sea, and anyone who entered there would basically not be able to get out alive. Of course, there are exceptions, such as a guy who is lucky enough to burst, or the existence of a truly powerful person who is not afraid of the internal environment of the Sand Sea.

At this moment, the night has completely shrouded the "Southern Xinjiang Sand Sea", and the low temperature of more than minus 70 degrees has made the entire desert world more desolate and lonely.

Suddenly, a figure appeared from the distant ground, in the center of the sand sea, which was already known as the death zone, and walked slowly. The cold, which could freeze the steel, didn't seem to be able to stop the figure from moving forward. And every time the figure takes a step, the figure will naturally cross a distance of 100 meters, just like it was only one step away.

When the figure approached, it was a human being with a height of one meter and eighty-five, with a gentle smile on his young face, and his eyes narrowed slightly, occasionally shining with a deep light.

"Heh, it's really a little cold, I didn't expect that I, who has reached the cold and heat, will actually have this feeling, and it will be even more difficult for those mortals to survive. Shaking his head, a mocking smile appeared on his young face.

"The center of the 'Southern Xinjiang Sand Sea' is as desolate and quiet as the legend says. It's no wonder that the task of obtaining the 'Purple Night Shadow' will be put on the task of 'God-level Trial', and it will be very difficult for ordinary people, even if they want to enter the center of the Sand Sea. What's more, I have to find the 'Purple Night Gloom' that I don't know where it grows. The young man muttered to himself.

"Forget it, who made me choose this 'god-level trial' mission at that time!" In fact, even if he didn't choose this task, if he wanted to be promoted to the Sword God, he would need to complete other tasks of the same difficulty, and most of those tasks were far away from the Demon Empire, and now he didn't want to leave the Demon Empire too far.

"But fortunately, the reward is not bad, at the cost of obtaining a 'Purple Night Shadow', you can get the formula of the 'Eternal Potion', which is still more cost-effective. Of course, not everyone can have such good luck. A huge ruin suddenly appeared in the distance, and some faint purple light shone in it, and the young man knew that he had found the purpose of his journey.

"Heh, I've found you, and the recipe can be obtained, so I should be happy for a while. The young man was not too excited to find his goal, and at the moment he still walked indifferently towards the ruined ruins.

This young man is none other than Long Xingyu, who came alone to do the trial mission of the Sword Master Guild. Nearly two years have passed since the teachings of Cold Condensation Frost, Mutian, and Salos Cultivation Method. In the past two years, Long Xingyu's body has grown a little taller, and in these two years, he has also searched through the entire collection of books in the Demon Martial Academy, and of course, the cultivation experience he got also has a certain help for his own cultivation.

After Han Ningshuang got the "Nebula Jue", she has been cultivating hard, relying on her extraordinary talent and physical condition, plus the equivalent of about ten years of cultivation, she finally improved her strength to the early stage of the Yuan Infant. Now, she is even more obsessed with alchemy, the elixir is divided into nine grades and eighteen orders, and because of the rich resources of the ring space, she is already able to refine the second-grade primary elixir at this moment.

As for Mu Tian, he had already reached the strength of the middle stage of Yuanhua at this moment, which was equivalent to the level of a ninth-level master. Of course, if he continued to cultivate according to the cultivation methods of this world, maybe his strength would be higher, but it would also hinder his future development. Although the strength is not improving quickly, it has laid a good foundation. Moreover, Mu Tian's cultivation was a sword cultivation method, and the initial cultivation was also quite time-consuming.

Of course, in the past two years, in order not to be suspicious of the teachers from the outside world, the two have also practiced a strange spell, "Transfiguration", which is a spell that can change the body and appearance, which is a spell that Long Xingyu deliberately found. Cold Frost and Mu Tian also cast this spell every day, so as to maintain their appearance at about ten years old, so they can also be unnoticed by others.

Usually, Cold Frost has always followed the teacher's side, and because of the study of alchemy, Cold Frost has also become interested in alchemy. In a sentence of Long Xingyu, innovation comes from communication and integration, whether it is cultivation or others, only by absorbing more knowledge and complementing each other can we broaden our thinking.

For two years, Long Xingyu did not have any restraints in the academy, so he would feel a little bored, so driven by curiosity and the pain of idle eggs, he left the academy, and in the southeast of the empire, he found the Sword Master Alliance, and joined as a member.

After completing the Juggernaut Trial a year ago, he also became the youngest Juggernaut master in the Sword Master Alliance. After that, he registered with the Adventurer's Union, the Wizards' Union, and the Mercenary Union, which are the continent's major trade union unions. Since then, Long Xingyu has often taken on some interesting tasks to do, one is to refine his actual combat ability and improve his cultivation at the same time, the second is to pass the boring time, and the third is to get some materials he wants, of course, a large part of them are prepared for the cold frost alchemy. And because Long Xingyu completed tasks that were generally very high-end and difficult to complete, the name of the "magic sword" he used was also widely spread in the strong circles of the mainland.

This time, in order to obtain the formula of the "Eternal Potion", Long Xingyu took over the task of the Sword Master Alliance, which is known as one of the top ten god-level trials. Due to the particularity of the task, the time limit for this task is one hundred and fifty years, and now, it is the one hundred and fiftieth year of time, and this moonless day will also be the final time limit for completing this task. In the past one hundred and fifty years, it is not that no one has come to look for it, but in the end, no one has really been able to bring out a "Purple Night Gloom", and even those who have come out have never seen this thing.

Originally, Long Xingyu didn't want to complete any god-level trials, but by chance, he heard Han Ningshuang say that it would be good if he could get the formula of the "Eternal Potion", and then he thought that there was still such a task hanging in the Sword Master Alliance. In order to surprise Frost, he decided to complete this task.

At this moment, in this ruin, Long Xingyu was pleasantly surprised to find that he had finally found this "Purple Night Gloom".

Walking slowly, looking at the huge stone-like structure around him that seemed to have been destroyed by a powerful force, Long Xingyu couldn't help but sigh, but he didn't stay too long, although he was a little interested in the civilization that once existed here, but he was only a little interested, and he didn't want to study it in depth.

"Well, it's good luck, there are actually three 'Purple Night Gloom', and it seems that they will be in full bloom soon. It's a pity that there is no such environment in the ring space, otherwise, if you transplant it in, wouldn't it be artificially cultivated in the future? "More than a dozen flower bones bloomed on the three 'Purple Night Shadows', and Long Xingyu knew that they were about to bloom, so he didn't rush to pick them, because only the blooming 'Purple Night Shadows' had an effect.

Time kept passing, almost around three o'clock in the morning, and the flowers that were originally standing still were also slowly blooming in Long Xingyu's somewhat excited gaze.

Just when Long Xingyu was about to pick, suddenly, there was a shock from the ground, and then, a strange "rustle" sound sounded, and in the center of the distant ruins, strange figures appeared in Long Xingyu's line of sight.