Lei Hao sat cross-legged in the secret room, carefully figuring out every detail of the refining weapon in the "Six Grades of Fire Golden Immortal Formula".

After a long time, after making sure that he had not forgotten anything, Lei Hao took out the dragon slayer that had been kept in his body with a big hand.

With a 'clang', the dragon slayer with a gap like an old blade unearthed from the ancient battlefield, making a cheerful knife roar around Lei Hao, a few breaths before stopping in front of Lei Hao, like a child showing off to his parents, kept shaking.

Looking at the cracks on the dragon slayer knife that almost cut it off, Lei Hao stretched out his fingers in distress and flicked its blade lightly, and said softly: "You, you are stubborn." The voice was full of helplessness.

The congenital conditions for slaying dragons are too poor, and these years have been fighting with Lei Hao in the south and the north, if it weren't for Lei Hao's constant use of mana to repair and nurture dragon slaying, with the materials of his body, he would have been shattered into a pile of scrap iron without a spiritual surname.

Even if Lei Hao has been using mana for more than a hundred years, the blade of the dragon slayer still has some almost irreparable cracks, and many times in the battle, Lei Hao is worried that the dragon slayer will not be able to support it and will be destroyed under the enemy's blade.

But after so many fierce battles, the dragon slayer is still strong, and Lei Hao can feel that it is completely relying on an obsession that does not give up even if it is broken, and it is fighting with Lei Hao, and that feeling is as if as long as Lei Hao is not killed in battle, it will fight with Lei Hao to the death.

'Buzz' two knife sounds, the dragon slayer flew to Lei Hao's body, rubbing hard, looking flattering.

Lei Hao sighed lightly, no longer paying attention to it, and with a flick of his wide sleeves, several clusters of metal of different shapes flashed with various colors of light appeared out of thin air, although each mass of metal was only roughly refined, and it was only a blank, but it exuded a strange and extraordinary momentum, which distorted the surrounding space incomparably, and the spatial turbulence kept raging.

"Tianhe Pure Gold, Copper of the First Mountain, Kun Gang ......" Lei Hao didn't care about these spatial turbulence, turned his head to take a closer look, these superb materials were deliberately collected by Lei Hao over the years, and the top ones were these three kinds of refining materials, among which Tianhe Essence Gold was given by the Peng Demon King, the copper of the first mountain was given by the Jiao Demon King, and the Kun Gang was given by the Jiao Demon King Bull Demon King.

These three are all good treasures that can be met but not sought, and they are all near-extinct objects in the realm, and the Peng Demon King, Jiao Demon King and Bull Demon King are either born in the flood wilderness, or the big demon who has old antiques in the flood famine period has such an accumulation, when Lei Hao fought with the general trend to the Bodhisattva and the Puxian Bodhisattva, several brothers saw that the blade in Lei Hao's hand was weaker, and the second brother Jiao Demon King also wanted to give Lei Hao a treasure knife, but Lei Hao was really reluctant to accompany him for so many years to slay the dragon, so he had to refuse.

At the time of parting, all the brothers gave the youngest Lei Hao and Sun Wukong some treasures. Sun Wukong had a golden hoop stick, and the other treasures didn't care, and these treasures all fell into Lei Hao's pocket.

Lei Hao looked at the treasures in front of him, and his heart once again flashed the scene of fighting with several brothers during the battle of Jilei Mountain.

"I don't know what happened to Lao Niu now?" Lei Hao thought with some emotion in his heart.

Moments later, the dragon-slaying roar woke Lei Hao from his contemplation.

As soon as these treasures appeared, the dragon slayer flew around the secret room excitedly. These treasures are strong, but they are all dead things, and although the dragon slayer is a little weak now, it is a spiritual thing with a weak soul after all, as if it is a domestic animal, no matter how big it is, it is just a delicacy in the population.

The dragon slayer stared at these delicacies for a while, but Lei Hao only cared about being in a daze and ignored him, so he let out a hungry knife sound in dissatisfaction.

"Okay, okay, I know you're ......in a hurry" Lei Hao glared at the dragon slayer angrily, opened his big hand, and a purple flame appeared in the palm of his hand without any variegation, and the high temperature emitted by this flame ignited a big black hole in the space in front of Lei Hao, this is the origin flame of Lei Hao's heavenly immortal level: thunder fire.

After releasing the thunder fire, Lei Hao felt that the mana in his body was being consumed at a slow rate, he didn't dare to slack off, as soon as his divine sense moved, Tianhe Essence Gold was thrown into the thunder fire, just a few breaths later, the silver sand like Tianhe Essence Gold turned into a silver round liquid.

Lei Hao's divine consciousness moved again, and the copper of the first mountain flew into the thunder fire, and then Lei Hao's whole body was absorbed in injecting mana into the thunder fire, and a few breaths of time passed, and the copper of the first mountain did not reflect at all, and even the edges and corners that protruded outward did not have the slightest trace of melting, Lei Hao thought about it, and suddenly increased the mana output, but another stick of incense passed, and the copper of the first mountain still did not melt at all.

"Why is this?" Lei Hao calmed his face, took the copper of the first mountain back into his palm, and felt it carefully for a moment, Lei Hao's divine sense sensed that the copper of this mountain contained a domineering and dignified sharp aura, this breath made Lei Hao secretly frightened, he had a feeling that if the fist-sized copper of Shoushan exploded, the sharp qi inside would kill all the creatures within ten miles.

After carefully speculating for a moment, Lei Hao once again threw the copper of the first mountain into the thunder fire and injected mana again, only this time Lei Hao did not inject gentle mana to maintain the burning of the thunder fire like just now, but uncharacteristically injected the mana with the attack surname, as if he was attacking the copper of the first mountain.

I only heard a muffled sound, and the copper of the first mountain suddenly exploded, like a berry full of juice suddenly exploded, and a bright yellow air flow rushed out from the copper of the first mountain, and it wanted to scatter when it collided, but how could Lei Hao, who had been prepared for a long time, let this sharp qi disperse?

Casually played a few spells to imprison this sharp qi, forcibly injected it into the liquid of Tianhe Essence's financialization, and after tempering it with mana for a while, Tianhe Essence began to constantly change into the appearance of ancient knives and swords.

Lei Hao, who was secretly relieved, stretched out his hand and took Kun Gang over and threw him into the thunder fire.

With the precedent of the copper of the first mountain, Lei Hao has already made some mental preparations for Kun Gang, a bone that is a little difficult to gnaw, but when Kun Gang was thrown into the thunder fire, Lei Hao was still surprised.

In the time of a stick of incense, Kun Gang only melted a little, although it was almost impossible to detect with the naked eye, but Lei Hao's divine sense kept watching and found that Kun Gang had melted a little.

"I say ......" After a secret curse in Lei Hao's heart, he cheered up and prepared to fight a protracted war of attrition.

I don't know how long later, the haggard Lei Hao happily found that the Kungang had finally been smelted and had turned into a silvery-white liquid.

Lei Hao struck out a few tricks in his hand, and Kun Gang squeezed into the liquid mixed with the Essence Gold of the Heavenly River and the copper of the First Mountain, and in an instant, it became a semi-solid with white and yellow, constantly changing swords.

"Slay the dragon," Lei Hao shouted hoarsely.

Dragon Slayer flew out of that corner quickly and happily, and a sudden brake stopped in front of Lei Hao, and kept shaking the blade to coquettish Lei Hao.

"Next, it might hurt a little bit, and you resist. Lei Hao stroked the blade of the knife and said softly.

The dragon slayer shook for a moment, and the bento was in response. Lei Hao's divine sense moved, and the dragon slayer was also ingested into the thunder fire, Lei Hao's divine sense tightly protected the weak soul of the dragon slayer, allowing the purple thunder fire to burn the dragon's sword body.

In the thunder and fire, the dragon slaying blade body forged mainly from ordinary Geng essence and extraterrestrial meteorite iron was like a dry straw, one point, but it burned out in a few breaths, and when the blade was burned, the purple soul kept letting out bursts of screaming and wailing, and that violent sound made Lei Hao's heart tremble.

The most critical moment came, Lei Hao carefully approached the dragon slayer soul to the semi-solid, and now the dragon slayer soul that has lost the medium of the blade is too fragile, and the sharp qi in the semi-solid can be broken up, and in that way, the dragon slayer will disappear completely.

Lei Hao's divine sense violently suppressed all the breath in the semi-solid, and then slowly injected the dragon slayer soul into the semi-solid little by little, fortunately, there was no moth, the dragon slayer soul successfully entered the semi-solid, and the appearance of the semi-solid instantly became exactly the same as the previous dragon slayer, but the appearance was no longer purple and black, but turned pale yellow.

This is not over, Lei Hao did not take back Lei Hao, and continued to inject mana into the thunder fire steadily, the new dragon slaying still needs Lei Hao's mana to cultivate nine hundred and eighty-one days to be successfully refined, in a period of time, the dragon slayer first slowly expanded like a balloon, expanded to a certain extent and then slowly contracted, so that after nine rounds, the dragon slayer floated quietly in the thunder fire, no longer moving.

This process just took nine hundred and eighty-one days, and at this time, Lei Hao, who looked like he had lost a lot of weight and was sloppy, suddenly withdrew the thunder fire, and at the same time, a mouthful of blood in his heart turned into a bloody arrow and hit the dragon slayer hard.

I only heard a 'snort', and the pale yellow light of the dragon slaying that had been floating quietly made a great effort, and a violent coercion swept over Kanyuan Mountain, and after just a few breaths, the dragon slayer collected the light, and directly broke through the layers of prohibitions in the secret room, and the blossom mountain flew to the top of Kanyuan Mountain.

At this time, on the top of the mountain, thunder was already rolling, and the black and oppressive clouds covered most of the Kanyuan Mountain.