Lin Yuan took the Monkey King and they soon came to the Black Iron Mine.

When they arrived, they found that the Black Iron Mine was indeed occupied by a group of demon beasts from the Valley of Ten Thousand Demons.

The leader is the three-headed demon beast in the early stage of foundation building.

Originally, Lin Yuan wanted to slap those demon beasts to death directly, but the Monkey King insisted on asking for battle, so Lin Yuan gave him a chance to practice.

As a result, the Monkey King still killed the three demon beasts in the early stage of foundation building in the Ten Thousand Demon Valley in a one-on-three situation, and also killed the other little demons and recaptured the mine.

After that, Lin Yuan personally took action, and arranged a second-level formation on the black iron mine, it was difficult for ordinary demon beasts in the early stage of foundation building to break this formation, and even in the face of demon beasts in the middle stage of foundation building, this formation could resist for a while.

After doing this, Lin Yuan left the little demon gate he brought, let them guard the mine, and continue mining, while he and the Monkey King returned to Lingshan.

......

After going back, Lin Yuan immediately retreated again.

He has a lot to do when he comes back this time.

The most important of these is to mix the medicinal wine needed to cultivate the Brute Bull Transformation, and use the blood of the silver Jiao to cultivate the Demon Blood Refining Dafa!

The materials needed to make medicinal wine, he had already collected almost before.

The rest of the materials are also gathered in the space ring of the hippopotamus and other demons.

So, after the retreat, Lin Yuan immediately began to mix medicinal wine.

The process of mixing medicinal wine was simpler than alchemy, so it didn't take long for Lin Yuan to make a large vat of blood-red medicinal wine and put it in some bottles and jars.

After making the medicinal wine, Lin Yuan sat down at the stone table and poured a glass.

Looking at the blood-red medicinal wine in the cup and smelling the pungent smell, Lin Yuan frowned.

The medicinal wine he concocted was darker in color and smelled stronger than the one recorded in the classics of the Barbarian Bull Clan, and he didn't know if it could be used.

But Lin Yuan didn't hesitate for too long, and after thinking about it for a while, he picked up the glass of red medicinal wine and drank it in one gulp.

"Boom!"

As soon as the medicinal wine entered his abdomen, it was like a raging fire, scorching Lin Yuan's internal organs, causing him to immediately feel a strong sharp pain, and he couldn't help frowning, and his face showed a trace of pain.

Immediately after, Lin Yuan hurriedly meditated and pranayama, ran the cultivation exercises, absorbed the power of medicine and wine, and cooperated with the brute bull transformation exercises to refine the physical body!

Soon, the power of that cup of medicinal wine was fully absorbed by Lin Yuan.

"What a strong effect!" Lin Yuan carefully sensed the changes in his body, and his eyes couldn't help but show excitement.

He found that the effect of this cup of medicinal wine was even stronger than the effect of cultivating a wild bull for a day when he didn't use medicinal wine!

This effect is much stronger than the medicinal wine effect in the records of the Barbarian Bull Clan!

In other words, the quality of the medicinal wine he refined was even better than that of the Barbarian Bull Clan.

According to the records of the Manniu classics, in addition to internal use, this medicinal wine can also be applied to the body for external use.

So then, Lin Yuan picked up the medicinal wine, drank it on his head, and wiped it on his body.

When taking the outer clothes, there is also a sting pain of burning fire, and those humans and demon beasts who are not strong enough in physical strength and willpower cannot bear this severe pain at all.

For Lin Yuan, this level of severe pain, although it was also quite uncomfortable, was not enough to affect him too much, and he could easily get through it by gritting his teeth.

Especially when he thought that these pains would increase his physical strength, he not only did not fear it at all, but also hoped to make the pain more intense!

......

Time flies.

Ten days have passed in the blink of an eye.

During this period, Lin Yuan had been cultivating with his head bored.

Now, his cultivation has been promoted to the point of mid-stage foundation building.

In addition, with the assistance of the Brute Bull Transformation and the medicinal wine, his physical strength has become much stronger, especially his hard bull hoot fist and horns, which are comparable to medium-grade spiritual weapons, and now even if he does not use spiritual weapons and mana, he should be able to deal with ordinary mid-stage demon beasts with his bare hands.

And if he goes all out, those demon beasts who have just advanced to the late stage of foundation building may not be able to help him!

Of course, Lin Yuan would definitely not be satisfied with this.

Next, he was going to cultivate the Demon Blood Refining Dafa.

In the past ten days, he had already purified the blood of the silver Jiao, and removed most of the impurities in it, which should be enough to cultivate the demon blood refining Dafa.

"Big brother!"

Who knew that just as Lin Yuan was about to cultivate, the voice of the Monkey King suddenly came from outside the cave.

"Whoosh!" Lin Yuan frowned, then his figure flickered, and he immediately rushed out.

He knew that if there was nothing important, the Monkey King would not come to disturb him at will.

"Brother Monkey, what's the matter?" Looking at the Monkey King with a solemn expression outside, Lin Yuan said curiously.

"Big brother, the Tiger King of the Valley of Ten Thousand Demons is out of the customs!" said the Monkey King in a condensed voice.

"Tiger King, so what?" Lin Yuan was slightly stunned, and then said disapprerovingly.

Even if the Tiger King is out of the customs, he should only have just advanced to the late stage of foundation building, and his strength may not be much stronger than him, so he doesn't need to be too afraid of the other party.

"Big brother, but after the Tiger King came out, he immediately announced to the outside world that he would kiss the Heavenly Demon Feng in ten days and challenge the strongest Demon King of the Heavenly Witch Country!" said the Monkey King solemnly.

"How dare he challenge the Elephant Demon King?" Lin Yuan was taken aback.

You must know that the Elephant Demon King is the peak cultivation of the late stage of foundation building, and he is only one step away from breaking through to the legendary Jindan period!

And the Tiger King of the Valley of Ten Thousand Demons has only just advanced to the late stage of foundation building!

The strength of the two should be very different, so Lin Yuan didn't understand where the Tiger King got the courage to dare to challenge the Elephant Demon King.

"Big brother, it is said that the Tiger King's combat power is terrifying, in the middle of foundation building, he will be able to resist the demon beasts in the late stage of foundation building, and after he breaks through to the late stage of foundation building, I am afraid that his strength cannot be speculated with common sense!"

"That's the same!" Lin Yuan frowned slightly and nodded.

He had also heard of the legend of the Tiger King, and that guy did seem to be an extraordinarily powerful monster.

And unfortunately, he and the Valley of Ten Thousand Demons are mortal enemies, and after this Tiger King is out of the customs, I am afraid he will not let him go easily!

Therefore, before the other party came to deal with him, he had to make some preparations in advance.

"Brother Monkey, you guard the house first, I'll go back when I go!" After pondering for a moment, Lin Yuan suddenly said.

"Okay big brother!" the Monkey King nodded.

"Whoosh!"

Then, Lin Yuan's figure flickered, and he directly turned into a streamer with an astonishing speed, and flew to the distant sky through the formation light shield outside the Spirit Mountain.

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