Nine Heavenly Thunder, one of the most powerful forces in heaven and earth.

When the living beings cultivate to a certain level and reach the upper limit of heaven and earth, they will usher in the baptism of the Nine Heavenly Thunder, which is commonly known as the "Heavenly Tribulation". Whether it is a living creature or a dead thing, those who do not die through the thunder of the Nine Heavens will undergo structural changes.

The slashing magic sword requires some kind of wood attribute material after the baptism of the Nine Thunder Tribulations as the main body.

Theoretically speaking, even the most ordinary willow wood in the world, as long as it has been baptized by the Nine Heavenly Thunder, can undergo qualitative changes and become a top-level spiritual material that can easily carry majestic spiritual power.

Originally, this kind of spiritual material was difficult to find in the world, but the few spirit puppet bodies that Kong Laosan had unintentionally collected in the Lingluo Immortal City in the abandoned land could just be used as a replacement.

These spirit puppets are said to have been brought by the power of the upper realm 30,000 years ago, and the materials used are naturally also the materials of the upper realm, but except for knowing that these purple bodies are a kind of wood attribute spirit materials, they don't know if they can be used to replace them, and Kong Laosan is not absolutely sure.

With the movement of his mind, a bunch of small mountain-like purple bodies were wrapped in a cloud of spiritual light, large and small, divided into seven parts, and fell on the seven different purple-black flames around him. As soon as they came into contact, the Sea-Swallowing Purple Yi was like a fluid, attaching to the surface of these bodies, wrapping these purple bodies in their entirety.

As time passed, the expression on Kong Laosan's face became heavier and heavier, and under the burning of the Swallowing Sea Purple Yi, these purple bodies were like smelly and hard stones, and there was no change at all. However, in the face of this only chance to refine the sword of beheading, Kong Laosan was also ruthless in his heart, and persevered in the end.

It wasn't until three months later, when Kong Laosan had gradually given up in his heart, undisguised disappointment on his face, and even secretly considered whether to try his luck at the other four major fire sources, but saw that under the purple-black flame, the spirit puppet that was originally fused with the flame seemed to have changed slightly, and before Kong Laosan could take a closer look, a purple droplet that seemed to have been brewing for a long time suddenly dripped out of the flame......

Melt into liquid!

Seeing this scene, the already desperate mind suddenly came to life, and Kong Laosan's face was completely depressed, and turned into a thick expectation.

As the first purple droplets appeared, a succession of "raindrops" slowly condensed at an extremely sluggish speed......

Half a year later, seven purple liquid masses of different sizes floated in front of him, Kong Laosan's mind moved, and these liquid masses finally fused into the size of a fist, and under the fine division of the power of divine thoughts, they were re-divided into seven purple liquid the size of lychees.

After doing this, Kong Laosan waved his hand, and the seven purple liquids re-escaped into the purple-black sea-swallowing purple flames around them, and gradually condensed into the appearance of seven "sword fetus" at an extremely slow speed.

Seeing this, Kong Laosan secretly breathed a sigh of relief, and at the same time, his eyes were slightly closed, and the silk of ten divine thoughts gushed out from the purple mansion again, and began to refine these spiritual materials......

The number of spiritual materials required to behead the magic sword is extremely rare, and a total of three hundred and thirty-six kinds are required.

Different spiritual materials require different temperatures, times, and temperatures to be smelted. In the case of being unable to control the heat, Kong Laosan could only find another way, wrapping these spiritual materials with the power of divine thoughts, and adjusting their position in the flames at any time, so as to achieve the purpose of controlling the fire in disguise.

However, in this way, it requires a lot of mind, a lot of energy, and a very strong power of divine thought. The process of refining spiritual materials requires patience and carefulness, and once there is any accident in the middle, the materials will be destroyed and all the previous efforts will be wasted. This process is a process of tempering the mind, but for Kong Laosan, this test is nothing.

Among the three hundred and thirty-six kinds of spiritual materials, ordinary spiritual materials are just fine. The three spiritual materials of the North Sea Mithril, the Stagger Golden Sand, and the Nether Spring Water each took almost two months.

Beihai Mithril itself has extremely strong law-avoiding properties, and after refining seven taels of Beihai Mithril, it will turn into a liquid liquid mass the size of a finger cap, dark silver color, and extremely round.

Each soybean-sized backwater golden sand has about 100 catties, in the original necromantic pool, in order to get these backwater golden sands, Kong Laosan himself also paid the price of a ghost road rune soldier, and was chased and killed by the Yin Thunder Demon Ancestor for more than 70 years.

After refining, the stagnant water golden sand is like a ball of finely ground gold dust, condensed into the size of a finger cap, hanging in front of him.

It is rumored that the Netherworld Spring originates from a Yin River called "Yellow Spring" in the ghost world, and once it comes into contact with yang power, it will be burned and killed immediately. Compared with ordinary spiritual materials, the purification of Netherworld Spring Water is somewhat special, and it is necessary to wrap a bottle of Netherworld Spring Water with the power of the Divine Soul, and then put it into the Sea-Swallowing Purple Yi to slowly roast.

In this process, Kong Laosan needs to continue to condense the power of divine thoughts until the Netherworld Spring Water is completely purified. If it weren't for the fact that Kong Laosan's divine soul power had already reached a certain level, I am afraid that he would really not be able to withstand such consumption.

After refining, the Netherworld Spring Water took on a viscous dark black color, the size of a finger, wrapped in the power of a divine thought, separating the inside and outside.

For a full nine months, after all the spiritual materials were smelted, Kong Laosan's eyebrows not only did not have the slightest relaxation, but there was a faint sense of urgency. As far as the eye could see, the flames that had originally been the size of palms had skyrocketed to the size of adults, and they continued to merge with each other, and the purple clouds that had enveloped the entire Dead Sea had dissipated for the most part, and at the same time, a faint oppressive force continued to brew in the center of the Dead Sea.

Without resting, as Kong Laosan's mind moved, the seven condensed sword tires fell into the largest sea-swallowing purple flame near the front, and at the same time, the spiritual materials refined by the Dao Dao were like dumplings, melting towards the seven purple swords.

On the one hand, you need to control the seven purple swords to condense and form, on the other hand, you need to put these spiritual materials around you into it in a certain order and heat, and finally, you must always pay attention to the changes in Lingyan.

One heart and three uses is already the limit of what Kong Laosan can do. At this moment, the Qingpao Daoist, whose mind was already tense to the extreme, couldn't be distracted by anything other than that.

With the integration of Dao spiritual materials, the seven-mouth magic sword gradually changed, and on the sword body, it was like a natural spirit pattern, and it actually conjured up patterns such as mountains, rivers, rivers, and rivers, grass, trees, and seas, which was very strange.

At the same time that the last three spiritual materials: Beihai Mithril, Stagger Golden Sand, and Netherworld Spring Water were divided into seven ways and integrated into it, and the sword was completely condensed, the original purple sword body suddenly glowed with faint golden lines, as if inlaid with a thin layer of gold edges, giving people a sense of indestructibility under the reflection of the sunlight.

Such a change came very suddenly, just when Kong Laosan's eyes flickered and he was thinking about something, something even more amazing happened: the seven-mouth magic sword that had been completely cultivated was actually extremely agile and scurryed in the flames, and in just a few clicks, this sea-swallowing purple yi was divided into seven parts, and they were devoured one by one......

The seven beheading swords are about three inches each, which is the same as the soul slashing swords, with a purple-gold color, and the lines of mountains, rivers and plants are printed on it, and the spirituality is very.

After the sea swallowing purple yi was devoured, the seven small swords were still not satisfied, like a hungry fish and whale, sweeping towards the surroundings with a whale swallowing momentum.

In Kong Laosan's perception, every time he devoured a sea-swallowing purple yi, these magic swords doubled in weight, but in half an hour, the seven small swords weighed a thousand pounds, like small mountains, and they were extremely difficult to control.

Just when Kong Laosan was about to forcibly control these flying swords to return, the power that had been slowly brewing seemed to have been affected in some way, and in the center of the Dead Sea, the huge purple vortex seemed to be a huge mouth that chose people to devour, almost in the blink of an eye, encompassing the surrounding more than three hundred miles.

"Swallowing Sea Purple Light?!How is it possible, it is not necessary to wait until the Swallowing Sea Purple Light has dissipated before you can ......"

The sudden change was that Kong Laosan's complexion changed greatly, and before he could make any movements, the seven flying swords were like fish falling into a net, unable to turn any waves in front of the power of heaven and earth, and fell uncontrollably with the whirlpool.

Seeing this scene, Kong Laosan's heart sank directly to the bottom, his face turned ruthless, and he directly turned into a green rainbow, exerting his escape technique to the extreme, chasing in the direction of the seven magic swords, obviously wanting to fight for his life.

At the same time as Kong Laosan moved, Qian Hu on his side also turned into blood, like a cannonball, following closely.

It's just that the two of them obviously underestimated the power of this "sea swallowing purple light", and just escaped into the purple light range, a strange pressure fell suddenly, and without any accident, the two were involved together.

At the critical moment when he was overwhelmed by the endless purple light, Kong Laosan still sacrificed a three-legged small tripod from time to time, and the black qi of the Dao Dao fused into a shield, enveloping the two of them in it.