The crater, which had been silent for many years, had already been covered with heavy snow, and if he wanted to penetrate underneath, he was afraid that he would have to make a passage by himself, but in order to practice sword materials, Lin Heng had to do so.

He stood on the flying sword, his gaze roaming around the crater. Soon, he found a place where the boulders were hidden. The walls of the mountain here are sunken inward, and the mouth below is covered by rocks, and although there is also heavy snow here, it is significantly less than in other places. He jumped to this place, stood on top of the snow, and commanded his sword to pierce the snowdrift like an electric drill.

Opening up a snow passage with a sword is not such a simple thing. In other places, the snow under the ground might have already frozen, and it would have been a thousand times more difficult for him to open a passage. Fortunately, this place is a volcanic crater, even if it is an extinct volcano, there are leylines underneath, and the huge heat will not make the heavy snow turn into ice, and even volatile heavy snow to a certain extent, so that there is not too much snow here.

Lin Heng dug with his long sword for a month, and finally dug through. He plunged down, holding himself with his long sword, and slowly landed in the dark underground.

It seems to be an underground river, but the difference is that it is not who flows in the river, but lava. The fiery magma had long since turned gray, and in some places it had even frozen, without the slightest luster.

Lin Heng held the long sword and injected the vitality in his body into the long sword, causing the long sword to bloom with a clear green glow, illuminating the land of Fang Yuan. With the long sword as the light, he slowly walked along the underground river, looking for refining materials around him.

He had good luck and soon found a piece of pyrolite. This is a spirit stone formed by the freezing of magma, which contains great fire energy, and if it is refined, the magic weapon refined will be extraordinary. It's just that this fire spar is far from the one that Master got, and even if he refines a long sword, he is not qualified to become an artifact.

"It's a pity!"

With a sigh, Lin Heng put away the fire spar and continued to move forward. Soon, he came to the end of the dark river. It seems to be a large pond with a lot of magma gushing in it. At a cursory glance, you can see that the magma in the dark river flows out of here, but I don't know what it is, the magma here has dried up. That's why the volcano outside will die.

The long sword carried Lin Heng to the top of the magma pool, and he looked carefully here, looking for any precious materials in the magma. It's just that he is destined to be disappointed, the magma here is like a pool of stagnant water, and from the surface, there is nothing else to see except the red warm current.

Taking a deep breath, Lin Heng, who was standing on the long sword, slapped it lightly. Silently, a cyan Tai Chi pattern appeared in front of him, slamming into the lava and stirring up a pool of stagnant water.

With a bang, the magma splattered everywhere, stirring up a small whirlpool, but it quickly calmed down again. It's just that Lin Heng's eyes, which had been watching, suddenly lit up. He once again punched a Taiji diagram and blasted into the magma, but his eyes were fixed on the center of the pool.

When the magma stirs, the magma in the center descends and surges around. At the place where it had sunken, there was a black pillar of stone stuck in the lava pool.

"There really is a ......," Lin Heng exclaimed in surprise. He blasted out the Taiji diagram again, this time with much more momentum than the previous two times, and the magma in the center of the pool was almost drained to the bottom by him. At this time, he also roughly saw the shape of the stone bar.

This is an ordinary boulder, but because of the perennial erosion, the stone has become thin and round. It's just that what Lin Heng doesn't understand is that this stone strip is black, not red.

Frowning and thinking for a while, Lin Heng let go of this thought. No matter what kind of eye this is, it must be a treasure. If you practice the sword with this stone, you will definitely be able to practice a sword that satisfies you. The most important thing now is not to think about anything, but to get the stone bar.

He took a deep breath, his body lit up with a cyan glow. After a while, the light changed, forming a huge Taiji diagram, enveloping him in it. In this way, he fell straight into the magma, and the hot magma met the Taiji diagram around him, and was immediately slapped around. Soon, he landed next to the stone bar at the bottom of the pool.

There was no time to watch too much, Lin Heng reached out to grab the stone bar, but as soon as he touched the stone bar, Lin Heng's body was shocked, and the blue light on his body was uncertain. He secretly bit the tip of his tongue, his whole body was full of blue light, and he once again held up the Taiji Diagram to block the fiery magma around him.

"Why do you feel like thunder and lightning? Could it be that this stone bar has been struck by lightning all year round? Lin Heng felt a little incredible. Just now he touched the stone, and instead of a fiery sensation, there was an electric shock like a lightning strike. This is really strange to him!

"Then you can't collect it by hand!" Muttering, Lin Heng's hands moved, and the invisible huge cyan palm grabbed the stone bar, but something even more serious happened than just now. Lin Heng, who had just grabbed the stone bar with his vitality, was stunned like a lightning strike, and his Taiji Diagram body protection mana instantly collapsed, and the red rolling magma instantly submerged him.

With a bang, blue light suddenly appeared in the magma, and Lin Heng stared at a layer of situation and flew out of the magma. He landed on the ground beside him, gasping for breath.

"This time it's a big deal!" Lin Heng touched his chest with some palpitations, there was a palm-sized piece of jasper there. This is a magic weapon that Lin Heng has refined himself, and it can automatically hold up a defensive shield when the master is in distress. In the magma pool just now, he survived on this piece of jasper. "Why is this stone so strange, not only can lightning strike people's bodies, but also lightning spirits, it's really ......"

For a while, Lin Heng didn't know how to describe this stone. Because it's so weird. But there is one thing that Lin Heng can be sure of, that is, this stone bar is definitely a strange treasure. Using this stone to practice the sword, it is impossible to say that it is impossible to practice a nine-heaven artifact like Tianya.

As soon as he thought of this, Lin Heng's heart became hot. The importance of a magic weapon to the monk is self-evident, you see Zhang Xiaofan, if it weren't for the soul devouring in his hands, he would have died many times. And when he was in the Seven Veins Martial Arts, why could he fight to the extreme, it was because of the soul devouring in his hands, otherwise he would not be able to pass the second battle when he first entered the realm of the fourth layer of Yuqing.

Although Lin Heng himself did not force the treasure, he could see that there was an absolute treasure to obtain, and he still couldn't refuse it in his heart.

He stood there, thinking seriously about how to get the stone bars in the magma pool. Soon, he came up with a solution, which was to open a small river next to it and draw out all the magma in the pool.

Do what you think. Lin Heng held a long sword in his hand, and the slashing of a sword kept going day and night. Soon a branch was carved by the side of the dark river. He digs low ground and connects the river with the magma pool with a sword, drawing the magma into the river.

Under his constant guidance, the magma in the magma pool flowed into the river little by little. It didn't take long for the entire magma pool to empty up, revealing the crimson earth inside. In the center of the earth, black stone stands out.

Walking in there, Lin Heng found that this stone bar was inserted into the ground, and the hole in the underground was not small, it was as thick as a person.

"Thin at the top and thick at the bottom, this thing looks like a mace!" With a self-deprecation, Lin Heng stood beside the stone bar, transmitting vitality for the stone bar in the air.

This stone, Lin Heng couldn't touch it at all, otherwise it would be struck by lightning. Therefore, in order to get it, Lin Heng could only refine it. Only then would he not be afraid of lightning strikes from above.

Lin Heng couldn't think of a good refining method here, the only thing was to instill the true element. It's just that every time he is instilled, he feels the feeling of a lightning strike, which makes him very uncomfortable. But there was no choice but to grit your teeth and continue.

I don't know how long it took, although Lin Heng had a faint feeling for the stone, he still couldn't pull him up with force. At this point, he was finally a little anxious. As he continued to infuse his vitality, he pondered whether there was any way to do it. Soon, he thought of the method of blood refining. It's just how to refine blood, but Lin Heng doesn't understand.

In the original book, Zhang Xiaofan's ability to refine bloodthirsty beads and dementor sticks was completely coincidental. To put it bluntly, it wasn't that he was refining blood at all, but that the bloodthirsty bead automatically absorbed his essence blood and resisted the dementor. In this way, the blood refining is successful.

Lin Heng asked himself that he didn't have that kind of chance, but if he didn't use the blood refining method, there was really no way to do it too quickly.

"Maybe, give it a try!"

In the end, Lin Heng still decided to give the blood trial a try. He bit his finger and sprinkled a few drops of blood into the stone, and then slowly entered the true yuan, forcing the blood into the stone with the true yuan.

Lin Heng didn't understand the method of blood refining, he could only use this method. In his understanding, blood refining is to fill the magic weapon with his own blood and make it one with himself. This stone strip obviously did not have the function of absorbing blood, so Lin Heng could only use the true yuan to force the blood into the stone strip in order to achieve his so-called blood refining.

With this alternative blood refining method, Lin Heng's speed of collecting stone strips was really much faster. Within a few days, he felt a strange connection between himself and the stone strips. This connection is different from the true element refinement, and it is a wonderful feeling.

Let's put it this way! When Lin Heng made initial contact with Zhenyuan, he would also feel the feeling of lightning strikes. But when he connected with his blood, the feeling of lightning was gone.

Things and people are one, people and things are one! It's about the way of blood refining. The artifact of blood refining is equivalent to a part of the human body, how can it attack itself?

At this time, Lin Heng didn't wait any longer, he directly held the stone bar and pulled it out of the ground with great force.

"I finally got you......" Lin Heng was excited as he held the stone bar, but before he could look at the stone bar too much, he felt the soles of his feet vibrate. He was taken aback, and his body instantly pulled into the air, and he looked down at the body.

In the cavern vacated by the stone bars, there was a blazing fire, from which the billowing lava flow slowly seeped out......

"The underground is the leyline...... Lin Heng was taken aback, he didn't want to run away without thinking about it, and as soon as he walked on his front foot, the underground magma behind him erupted, and endless magma erupted from the mouth of the cave, instantly filling the magma pool and pouring into the underground dark river.

Following Lin Heng, the magma flowed very quickly, and after a while, he came to the crater. It's just that this place has already been covered by heavy snow, and it won't be a matter of a moment if it wants to erupt. But Lin Heng knew that there would definitely be an eruption here because the magma had been trapped underground for too long.

"I can't stay here, hurry up!"

Lin Heng was not in the mood to see any magma erupt, and as soon as he came out, he flew into the sky, and he didn't stop, flying into the distance. It's just that you pay attention, the direction he flies is not Qingyunmen, but the direction further north.

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