Outside of the Ancient Desolate Sky Tomb, the faces of the elders from the four major sects were currently gloomy. They were currently staring at the consecutive pile of life tablets in their hands as intense waves of killing intent surged from their bodies.

"Who, who could it be, has consecutively killed more than half of the disciples of the four great sects within this half month!" At the side of the old man standing atop the kite, layers of thunderous clouds gathered together. The thunderclouds seethed and surged with his fury, as thunderbolts containing destructive might gushed out from them.

The elders leading the other three sects didn't say anything, but it was obvious that their eyes were full of anger as well. This person who dared to kill their disciples was simply too much.

"As far as I know, around this Shiwan Mountain, there are not many clans with the ability to cultivate such strong cultivators. It can be counted on one hand, and to these clans, the Heaven's Pride that can kill the cultivators of the Four Major Sects is something they would never be willing to release."

"A single Sky Desolate Mystic Realm isn't enough for them to take the risk. Then, who has the guts to make an enemy out of my four great sects?"

The old man standing on the floating treasure ship pondered, wanting to deduce a clue. However, no matter how they calculated it, they would never imagine that the person who killed their disciples was a young man and woman.

Phew, Lian Chengyue let out a long exhale of Turbid Air, and looked at the cultivator beside his feet that was slowly collapsing. With a thought, a ball of white-gold flames smashed onto the corpse, burning it without leaving a single trace.

"Hong Ling, as far as I know, the number of people from the Four Major Sects that have entered the Ancient Desolate Mystic Realm this time around does not exceed a hundred. Now that we have already killed nearly half of them, shouldn't we stop?" Lian Chengyue asked.

Hong Ling nodded his head. Actually, he did not want to kill the cultivators from the Four Major Sects either. However, these fellows were like mad dogs, able to find traces of them.

"These guys, how on earth did they know that we were the killers of their own kind? Could it be that they have some sort of secret skill?" Hong Ling thought for a while, then sent his consciousness into his body to carefully search.

If he guessed right, there must have been some kind of imprint on his and Lian Chengyue's bodies. These imprints, when they killed the cultivators from the Four Major Sects, would silently be imprinted into their bodies;

"Hmm? "So that's how it is!" Hong Ling looked at the small killing mark that was currently floating in his dantian, and a secretly happy expression flashed across his eyes.

"Ah Yue, before the Four Major Sects' cultivators died, they left a killing mark in our dantian. We must erase it in order to get rid of these bastards!" With a thought from Hong Ling, a small wisp of the Heavenly Desolate Sacred Flame appeared in his dantian and immediately burned the imprint.

Lian Chengyue followed suit, and very quickly, he burned the imprint on his own dantian, and the two of them quickly flew away, disappearing into the distance in the blink of an eye. In a short fifteen minutes, the few cultivators stopped, their eyes gloomy.

"The mark has actually disappeared. Could it be that the two people who killed our fellow disciples have disappeared?" Shangguan Qinghong stared at the grass in front of her, trying to find something, but she could not find anything, not even the remains of her fellow sect members.

The people following behind him also had doubtful expressions. To be able to kill nearly fifty cultivators from the four great sects in just a few short days, the strength of these two individuals was definitely not inferior to theirs.

However, if they did not have the cultivation of Spirit Refinement and were unable to erase the imprint on their bodies, could it be that these two really met a powerful Bone Beast and died without a burial?

At this moment, the cultivators of the four major sects within the Ancient Desolation tomb were all panicking and no one dared to act alone. They were afraid that they would run into the fiend who dared to kill their fellow sect members.

Unfortunately, after burning the mark, Hong Ling and Lian Chengyue had lost the interest to fight …

"Now, look at our spoils of war!" In a concealed location within the Heavenly Desolate Secret Realm, Lian Chengyue giggled and casually took out the spoils of war that he had plundered during the past few days.

Fifty interspatial rings, countless gold and silver, some jade and jewelry, and even some extremely rare spirit stones.

Hong Ling picked up the diamond-shaped stone and studied it carefully. This was a legendary Spirit Stone, containing a vast amount of Spiritual Power s, which could be directly absorbed by cultivators and turned into Authentic Qi s. There was no need to worry about the mixed problems of Spiritual Qi.

These Spirit Stones were at least two hundred Spirit Stones, although each of them were only the size of a thumb, it was enough for Hong Ling and Lian Chengyue.

"Ah Yue, this gold, silver, jade and the like. As long as it can be refined using the Heavenly Sacred Flame, I think we should refine it first. The youth said with a smile.

"Kun Steel?" Lian Chengyue's eyes flashed, "You mean the Kun Steel used to create ancient Divine Equipment?"

Hong Ling nodded his head. Kun Steel s were the most powerful divine crystals in the world, formed from profound crystals, gold crystals, secret silver, jade marrow, copper crystals and a few other things.

In ancient times, there were Human Clan alchemists who forged the first Kun Steel, using this to create the first Diamond Gem, and then killing the Ancient Demon King. In an instant, the name of the Kun Steel resounded like a thunderclap, the Kun Steel was not an immutable metal, as long as they gathered at least nine different types of divine materials, they could start forging.

If he were to come across other divine materials in the future, he could still smelt them and raise the quality of the Kun Steel.

The two of them found a huge palace and closed the door. They then started to smelt the materials in their hands. There were piles of gold, silver, and even jade, only leaving a small amount of crystals.

These crystals, if placed outside the Ancient Tomb of Everlast's secret realm, would cause huge waves. A whole nine days later, Hong Ling and Lian Chengyue's eyes were bloodshot as they stared at the various ingredients placed in front of them, their eyes filled with pleasant surprise.

From the decorations of the palace to the throne, there were also those bronze lamps, iron gates, and even rotten armor and weapons. Hong Ling and Lian Chengyue spent days and nights collecting and smelting them, and finally, on the ninth day, they gathered all nine types of divine materials.

"Gold, mithril, profound crystal, copper crystal, jade marrow, space crystal, demon crystal refined from Demonic Beast's inner core combined with spirit stone and our blood. I think it should be enough!" Hong Ling stared at the seven types of crystals in front of him, and instantly changed into a dragon form. Using his fingers as a sword, he cut through the Dragon Scale, leaving behind a ball of dragon blood essence the size of a fist in the air.

Seeing him like that, Lian Chengyue summoned out her phoenix wings without hesitation, and with a light stroke on top of the phoenix wings, she retrieved a ball of phoenix blood essence.

Under normal circumstances, the blood essence within their bloodlines would not be extracted, but they themselves could cut off the connection to the blood essence to obtain it. However, doing so would harm their foundation.

Both of them had gathered blood essence without damaging their foundation. Although it was only the size of a fist, it was still comparable to those crystals.

"Ah Yue, it's about to start, are you ready?" Hong Ling breathed out a strand of Turbid Air and asked Lian Chengyue.

The young lady nodded, her eyes full of caution. Refining out Kun Steel s was a huge challenge for the two of them, but they had no way out. The two of them did not have any weapons on them and it was difficult for them to defend themselves, so if they met any strong Demonic Beast s, it would be difficult for them to fight them without any weapons.

This was the result of Hong Ling and Lian Chengyue's numerous experiments. The primal chaos flames were even more tyrannical than the two of them when compared to the Heavenly Desolate Sacred Flame, and it could not be better to use it to smelt the Kun Steel s.

Hong Ling casually waved his hand, and the seven types of crystal stones and two balls of divine blood were instantly thrown into the Primal Chaos flames in the air.

Pfft, these seven crystals actually showed signs of melting. However, Hong Ling and Lian Chengyue frowned, even though the primal chaos fire was powerful, the consumption was also huge.

Although the two of them could use a cultivation method to convert a Authentic Qi into a consciousness after they advanced to Qi Refinement into Spirit, they could only maintain the primal chaos fire so that they would not be able to use profound arts. As a result, the recovery speed of the Authentic Qi could not keep up with the consumption of one's consciousness.

Hong Ling clenched his teeth, and increased the output of his mind consciousness. In a moment, the flames of primal chaos became berserk, and the seven types of crystals actually started to slowly melt.

Lian Chengyue saw that he alone shared the majority of the spirit sense output, and immediately changed his focus to train his profound arts, restoring his own Authentic Qi.

This was something that they had planned beforehand. One of them was responsible for maintaining the primal chaos fire at full power, and the other for restoring his own Authentic Qi.

The seven types of crystals had completely melted, and it took seven hours for them to melt. However, Hong Ling and Lian Chengyue had persevered on, however, they did not manage to refine the Kun Steel because they were still lacking the two divine materials.

At this time, Lian Chengyue's divine sense gushed out, throwing the two lumps of dragon and phoenix blood into the flames.

Boom! The entire hall shook and the two balls of God's blood instantly submerged into the crystal liquid.

The crisp sound of a dragon's roar came from within the flames of primal chaos, followed by the shrill cries of a phoenix. The two blended together, creating waves of sound waves in the air.

Hong Ling and Lian Chengyue instantly sealed their five senses with their consciousness, no longer listening to the two berserk sounds anymore. They forcefully endured the churning blood and energy in their bodies, and struggled to maintain the burning flames of primal chaos.

Four hours later, the dragon's cry and phoenix cry had gradually quieted down as Hong Ling and Lian Chengyue's nervousness had reached its peak.

Because at this moment, within the primal chaos fire, a huge rhombus crystal was slowly taking shape. On its exterior, countless profound runes were slowly appearing and disappearing, just like the stars in the sky.

"Ah Yue, stop. Whether or not you and I can become Kun Steel s is not something we can get involved with!" Hong Ling said as he looked at the amber-colored crystal within the primordial flame.

Kun Steel did not always succeed in smelting. Other than having to use flames to refine at least nine different divine materials into one, it had to undergo a transformation. And the foundation of the transformation was transcending tribulation.

Hong Ling and Lian Chengyue withdrew their hands at the same time, cutting off the connection with the Primal Chaos Fire. However, the flames did not extinguish, but instead wrapped around the crystal and slowly rose into the air, breaking apart the gigantic palace in an instant, causing it to blossom with dazzling light within the secret realm.

Buzz! An intense metallic sound suddenly echoed out between the heavens and the earth. The entire Heaven Desolate Mystic Realm instantly surged with winds and clouds.

Boom! The air instantly split apart at the dome of the secret realm. A resplendent lightning ruthlessly smashed onto the crystal, causing it to create a savage crack.

"This is … Heavenly Tribulation!" Hong Ling stared at the crystal in the air, and a look of shock flashed past his eyes. He did not expect that the crystal he forged together with Lian Chengyue would actually attract the divine retribution.

"Great! Hong Ling, this crystal is beginning to undergo tribulation!" Lian Chengyue cheered, but Hong Ling did not dare to be careless.

To transform into a Kun Steel, this crystal must first experience the bombardment of the Nine Heavens Thunder Technique.

Boom, another bolt of lightning, another crack appeared on the surface of the crystal, Hong Ling tightly clenched his fists, his heart extremely nervous.

The Kun Steel was a material that everyone in the world dreamed of crafting, and it could be used to create miraculous divine crystals. Boom! Boom! A few consecutive bolts of lightning struck down, and in Hong Ling's stupefied state, the crystal instantly shattered, turning into countless fragments.

"How could this be?" Lian Chengyue covered his mouth, and stared at the crystal fragments floating in the sky with unwillingness, "After being struck by eight lightning, it shattered!"

She was somewhat unwilling, but there was no sadness in Hong Ling's expression, if he could create a Kun Steel during his first attempt at smelting, that would be good, but if he couldn't, then it wouldn't matter.

"Ah Yue, don't be discouraged, look!" Hong Ling pointed to the fragments in the air.

Boom!" Another huge bolt of lightning fell down, ruthlessly smashing on those fragments.

Weng, in between the heaven and earth, an ancient Buddhist chant suddenly sounded out, it was as though text was resonating between heaven and earth, Hong Ling and Lian Chengyue instantly closed their eyes, as though they had fallen into a deep sleep, and were comprehending the profoundness of the scripture.

Chaotic symbols appeared on each of the crystals in the air, and then they were hidden within the fragments. A halo of chaos appeared, and all the fragments gathered together once again. A speck of chaos fire instantly appeared, burning all the fragments once again.

Countless amounts of star power descended from the sky, fusing into the flames and crystals. After the void disappeared, the flames also retreated. That huge crystal remained suspended in the air unharmed, with chaotic halos of light flowing around its body.

Weng, it hummed, and instantly split into two, transforming into two streams of light, and entered Hong Ling and Lian Chengyue's dantian, disappearing without a trace.

The instant the two crystals entered his dantian, Hong Ling and Lian Chengyue woke up. The two of them seemed to have realized something and smiled at each other.