Above the misty Earth's Heart Sea, the huge but slender and beautiful Xuanhu cleaved the waves and sailed quickly to the northwest.

A day ago, Qingshi and the others said goodbye to Big Dream Island and started a new journey. The five people of Luoluo Mountain returned along the way they came by the airship presented by Qingshi, and the Qingshi and Aso took the Xuanhu to the northwest.

Aoshi wanted to take Aso to the surface world to see, but Aso said that he wanted to go home, his home was in the sea, and he had not seen his family for more than 2,000 years, and he had to go back. Bluestone naturally no longer insisted.

However, Aso is not at ease, so he has to help them find the exit first, and send them out of the underground world before going back.

Qingshi originally wanted the Xuanhu to fly over the heart of the earth, but after flying for a while, Aso said that he was afraid of heights, so he had to let Qingshi land the Xuanhu on the surface of the sea to sail, and Qingshi had to rely on him.

With Asu on the ship, naturally no sea beast dares to come to spread wild, Asu was one of the strongest sea beasts in this underground world more than 2,000 years ago, otherwise the desert dragon would not have caught him to protect his dream island.

The Desert Divine Dragon used a secret method to cultivate Asu, not only allowing him to turn into an 'immortal', but also his combat power soared exponentially, he had long been the strongest man in this underground world, and he had no opponent.

On the Xuanhu, Qingduan Chen and Asu were comfortably half-lying on the deck chair drinking and bragging, but Asu suddenly stood up and walked to the side of the ship to take a look.

"Big brother," Aso said to Qingshi with a smile, "You helped me break my oath and save me from a thousand years of sin, and I haven't repaid this kindness yet." ”

"Asu!" Qingshi said, "Our own brothers, why are you saying these polite words? ”

"It's not polite," said Aso, "I have a big gift here for my eldest brother." Now if you fly into the sky, you will fly at least a hundred feet high. ”

"Huh?" Qingshi sat up and asked suspiciously, "Asu, what are you going to do?" ”

"I'm going down to the sea to fetch treasure for you!" Aso smiled, "Hurry up and fly up." With that, Aso jumped lightly and plunged headlong into the sea.

Qingduan Chen and the others were all stunned, and Qingshi hurriedly urged the aura drive of the Xuanhu as Asu said, and began to climb as hard as he could.

The aura of the underground world was extremely abundant, and the aura drive operated very efficiently, and soon pushed the huge Xuanhu into the air.

Qingshi stabilized the hull of the boat, and the three of them lay on the side of the boat together and looked down, only to see that the sea under their feet had begun to swell with white waves, like a boiling pot.

Suddenly, two wrestling behemoths burst out of the sea, and they stirred up a huge wave, rolled up a huge whirlpool, and let out a terrifying roar. I saw that the waves were mixed with splashing scales and blood, and the violent and bloody scene was thrilling.

The two behemoths couldn't tell what species they were, but Bluestone felt that one of them looked like a dragon, while the other was completely unrecognizable. They are much worse than Ah Kun in terms of length and size, but such a behemoth fighting in the sea, its destructive power is enough to sink the Xuanhu, no wonder Aso let them fly into the sky.

Qingshi couldn't tell which of the two giant beasts was Asu, and he couldn't tell who had the upper hand, so he wanted to help Aso but couldn't do it. As for Duan Wutian and Chen Tianye, they were simply powerless.

The battle between the two beasts above the water lasted less than half an hour, and soon sank into the depths of the sea again, and then the sea gradually subsided, leaving only large swaths of scale armor floating in the water, and blood constantly rising from the depths of the sea, and the air was filled with a thick bloody atmosphere.

Qingshi controlled the Xuanhu to descend, and soon descended to a distance of only twenty zhang from the sea.

Suddenly, the sea exploded again, and a person rose into the sky, shooting straight into the sky with a column of water dozens of feet high.

It's Aso! The bluestone can be seen clearly.

Aso naturally saw the Xuanhu as well, he took a step in mid-air and landed steadily beside Qingshi, his whole body was dry and refreshing, without the slightest water stain, let alone half of the scars.

"Asu," Aoshi asked, "Are you fighting a dragon?" ”

"That's right!" Asu smiled, "That old thing has been killed by me, Old Chen Lao Duan, I'll give you something to see you off, this is the essence blood and inner pill of the transformation immortal old dragon." ”

Asu threw Chen Tianye a Neidan and Duan Wutian a bottle of Jiaolong essence blood, all of which were still steaming hot and extremely fresh. Duan Chen and the others were both happy to thank them.

Then, Asu took out another jade box and presented it to Qingshi, and said with a smile: "Big brother, this is an elixir, you can accept it." ”

"Elixir!" Qingshi said curiously, "Is it really an elixir?" ”

Qingshi said as he took out a round elixir the size of a pigeon's egg from the jade box to take a closer look, and Duan Chen and the others also came over curiously.

I saw that this 'elixir' was dark gold, exuding a faint halo, and the pill was densely covered with hair-like fine dao lines, faintly with the rhyme of the heavenly way like a dense mist, slowly circulating on its surface.

Qingshi was taken aback, that's right, this is the legendary 'elixir', also called 'Dao Dan'.

Qingshi had never seen an elixir, but as an alchemist, he naturally knew what the so-called 'elixir' was and what it looked like.

'Immortal elixir' is said to be a top-level elixir only available in the era of immortals, and it was refined by a god-level Dan master. The most precious thing about the elixir is not its medicinal power, but the rhyme of the Heavenly Dao that is smelted into the elixir.

After the monk takes it, he will gain the comprehension of the 'Dao', that is, if this elixir contains the Heavenly Dao of Gold, then the monk who takes it will instantly understand the Dao of Gold, and if this elixir contains the Heavenly Dao of the Wind, the monk who takes him will understand the Dao of the Wind.

Understanding a heavenly path is one of the most basic conditions for becoming an immortal, so such an elixir is called a 'fairy elixir'.

However, this kind of elixir is not something that any monk can eat, generally speaking, only a monk of the ninth stage of the immortal pill realm can take it, and after taking it, this monk will almost definitely understand a heavenly way, so as to brand the Dao pattern on his elixir and become a monk of the Shenyuan Realm.

Cultivators of the Shenyuan Realm can comprehend the Heavenly Dao contained in a pill and greatly improve their strength, while monks below the high level of the Immortal Pill Realm will most likely not be able to withstand its surging medicinal power and their bloodlines will burst and die.

Qingshi saw that the 'Dao' contained in this elixir was the Heavenly Dao of Wood, and this was the Five Elements Heavenly Dao that he had comprehended the least at present, so he was overjoyed.

Although Qingshi's true qi level was only the third stage of the Immortal Pill Realm, the quality of his Five Elements True Qi was so high and the total amount was so large that it had already far surpassed that of ordinary Immortal Pill Realm Ninth Rank cultivators. There is no problem in taking this elixir now.

Qingshi's biggest cultivation goal at present is to comprehend the Five Elements Heavenly Dao, once comprehended, you can use the Five Elements Heavenly Dao to brand the elixir, and sublimate your inner Dan into a divine element (Dao Dan) containing the Five Elements Heavenly Dao.

When his True Qi level reached the ninth rank, he would naturally step into the Divine Yuan Realm and become one of the strongest cultivators in the entire Heavenly Dragon World, there was no doubt about that.

Back then, Jiang Tianlong and the great cultivators of their generation were all branded with the Dao of Heaven corresponding to their own true qi. For example, Zeng Bufan's Dao Dan is imprinted with the Five Elements Heavenly Dao, while Jiang Tianlong's Dao Dan not only imprints the two great Heavenly Dao of wind and thunder, but also has the Dao patterns of the three Five Elements Heavenly Dao of gold, earth, and water.

Qingshi has nine true qi, if he can brand his Dao Dan on the nine heavenly daos, then he must be the first person in this world.

In addition to being excited, Qingshi asked where this elixir came from, Asu told a story from the past, and Qingduan Chen and the others knew its origin.

More than 2,000 years ago, the Desert Divine Dragon accidentally discovered the underground world, so he wanted to occupy an island here as his dormant place, however, the overlord of the underground world, the dragon transformation demon Gao Tangjun disagreed.

Gao Tangjun is the only shape-shifting demon in the underground world, but he can't defeat the desert divine dragon, so he entangled the three major forces of the underground world to fight against Long Moyun.

Long Moyun was helpless about the strength of the three clans, so he bought Gao Tangjun at the price of an elixir, and Gao Tangjun coveted the elixir, so he sold Dameng Island to Long Moyun, and the two sides agreed not to invade each other and not interfere with each other.

Without the Jiaolong clan, Long Moyun quickly defeated the other two major forces, except for a few demons of the Tulong clan who were killed, the rest were all captured by him, and after erasing the spiritual wisdom, he guarded the dungeon for him and patrolled the underground world and strangled outsiders.

The Aso clan was lucky, and in order to prevent the tribe from being slaughtered, Aso voluntarily made a master-servant oath with Long Moyun to protect Dameng Island for Long Moyun for 3,000 years. For his own safety, Long Moyun used the last elixir to cultivate Asu, making him a shapeshifting demon.

After Gao Tangjun got the elixir, he didn't use it for himself, because he himself had already transformed at that time, and using this elixir didn't help him very much. He wanted to wait for his heir to grow to a certain level, and then use the elixir to cultivate another transformation immortal. It's a pity that his descendants are not outstanding, and none of them have been able to cultivate to the point where they can use the elixir to form immortals for more than two thousand years.

Just now, Gao Tangjun and his descendants who had already produced Lingzhi's descendants, a total of six dragon demons, were all killed by Asu. Asu launched an attack on Gao Tangjun almost as soon as he gained freedom, not only to retaliate for his betrayal back then, but also based on the natural laws of this world, because there can only be one overlord in this underground world.

"Hmm~" Qingshi looked at the elixir in his hand, and said thoughtfully, "This elixir can't be refined by the Great Desert Divine Dragon, where did he get it?" ”

"It should have been refined by his elder brother," Asu said, "The old guy has a brother named Long Motian, who is the number one alchemy master in the Shenmu Continent. He said that his brother would come to him and heal him, and that for three thousand years, whenever his brother came, he would give me freedom in advance. ”

"Oh!" Qingshi suddenly realized, "It turns out that the person he is waiting for is his brother!" ”

"But~" Chen Tianye said, "No matter how powerful his brother is, he is not an immortal, how can he refine the elixir?" ”

"Well~" Asu said, "I don't know about alchemy, I don't know." ”

Qingshi also felt strange, but he didn't know exactly what was going on, so he didn't ask anymore.

Qingshi took this elixir on the same day, and three days later, he had already understood the way of wood, and he had improved a stage of true qi cultivation, reaching the fourth stage of the elixir realm.

After ten days of sailing in the Earth's Heart Sea, the Xuanhu finally reached the northwest coast, and after this voyage, Qingshi and they also roughly understood the topography of the entire underground world, which is a large underground rift in the northwest-southeast direction, about 2,500 li long and ranging from 200 li to 500 li wide. Most of the Underworld is covered by the Inner Sea, and the mainland is only surrounded by coasts and a few islands.

After landing on the northwest coast, they quickly found an underground river that flowed into the heart of the earth, and Aso said that the last group of people who came here about two hundred years ago came along this underground river, and as long as they walked along this river, they would definitely be able to get out of the underground world.

Qingshi and Asu said goodbye, and Duan Wutian and Chen Tianye also regretted that they couldn't take Aso to the earthly world.

After exchanging treasures, Aso jumped into the sea, and then turned into a giant beast to free up the water, this giant beast was thirty zhang long, the dragon's head and horse body, tiger claws and fish scales, it let out an earth-shattering roar towards the bluestone, and then turned to the southeast, and the huge body rolled up the huge waves, wave by wave.

"Oh my God!" Chen Tianye looked at Asu's vanishing figure and muttered, "Water Qilin! It turns out that Aso is a water unicorn! ”