After returning to Lingshan, Lin Yuan immediately took the three flat-headed brothers into the cave and began to test the medicine.

He first took out three spirit grasses from the space crystal, and then ripped off a small piece of each and fed it to the three flat-headed brothers.

And just as the three flat-headed brothers swallowed the spirit grass, Lin Yuan's gaze directly penetrated their bodies, carefully observing the changes in the spirit grass in their bodies.

As a result, after swallowing the fragments of these three spirit grasses, the three flat-headed brothers did not change significantly, but only absorbed the spiritual energy from them.

It can be seen that these three spirit grasses, at least not poisonous, can be used directly.

And this, for Lin Yuan, is enough.

As for the specific effects of these spirit grasses, he could experience them on his own in the future.

Next, Lin Yuan followed this method and continued to let the three flat-headed brothers try the medicine for him.

......

Moonset and sunrise.

The night soon passed again.

When the morning sun shone into the cave, Lin Yuan finally completed the drug test.

It's just that at this moment, the three flat-headed brothers are all lying on the ground with their eyes closed, as if they are dead.

Lin Yuan on the side looked at the three flat-headed brothers, shook his head and smiled, with a look of gratitude in his eyes.

He knew that these three flat-headed brothers were not dead, but just poisoned.

This happened several times last night.

After each poisoning, they will be in a coma for a period of time, and when they have digested the poison, they will wake up automatically.

Moreover, every time they came to their senses, their cultivation was able to improve a little, as if poison was a tonic for them.

"Roar, roar, roar......"

Sure enough, after a while, the three flat-headed brothers came to their senses, and bared their teeth and yelled at Lin Yuan, meaning that the medicine is also finished, you can let us go, right?

"Moo!"

Lin Yuan smiled indifferently, meaning to say, what's the hurry, isn't my spiritual mountain good? It's rare to see a place with such a strong spiritual energy, if you stay here to cultivate, it will be of great benefit to you, don't you think about it?

“......”

Hearing Lin Yuan's suggestion, the three flat-headed brothers were slightly stunned, glanced at each other, and showed hesitation in their eyes.

Lin Yuan was right, the aura of heaven and earth here was indeed very strong, and they did want to stay a little bit.

"Roar, roar, roar......"

After thinking about it for a while, the three flat-headed brothers yelled at Lin Yuan again, and their consciousness was to say, it is not impossible for us to stay, but we have a few conditions.

“......”

Lin Yuan was slightly stunned and frowned.

These three flat-headed brothers are really successful, and they actually know how to negotiate conditions with him, and there is more than one condition.

"Moo!"

After being depressed for a moment, Lin Yuan frowned and roared, meaning to say, yes, what conditions do you have?

"Roar!"

One of the flat-headed brothers roared, meaning that, first of all, all the poisonous weeds we ate last night should be given to us.

"Moo!"

Lin Yuan frowned, and there was a hint of pain in his eyes, but then he gritted his teeth and nodded, meaning that it was okay.

Although those spirit grasses were poisons, and he couldn't use them for the time being, he didn't know if he could use them in the future.

Perhaps, in the future, he will find out that those poisonous weeds are actually very expensive herbs.

Therefore, he actually intends to stay with him forever.

However, for the sake of these three flat-headed brothers, last night, they helped him try out a lot of poisonous weeds, and those few poisonous weeds can't be used as a reward to reward them.

Of course, there is actually another reason why Lin Yuan is willing to give up those poisonous weeds.

That is, he didn't have a good way to preserve those spirit flowers and spirit grasses for the time being, even if he put them in the space crystal, the aura in them would continue to be lost, and after a long time, the medicinal effect would be greatly reduced, or even completely lost.

In other words, it may not be long before those spirit flowers and spirit grasses will become useless things, since this is the case, it is naturally better to reward those three flat-headed brothers.

"Roar!"

Hearing Lin Yuan's agreement, the three flat-headed brothers looked at each other and smiled, cheering in unison, looking very happy.

"Moo!"

At this time, Lin Yuan frowned and roared again, looking a little impatient, meaning to say, what conditions do you have, say it quickly.

"Roar!"

One of the flat-headed brothers immediately roared, meaning that we still want to be free, we are not your slaves, you can't beat us in the future, you can't force us to do what we don't want to do, you can't ......

"Moo!"

Without waiting for the flat-headed brother to finish speaking, Lin Yuan's face sank, and he roared angrily, and at the same time, with a movement in his heart, he took out the green short sword from the space spar and directly volleyed it on the flat-headed brother's head, and the sharp green sword even cut through the flat-headed brother's skin, causing a blood mark to appear on his head!

And the meaning of Lin Yuan's roar was, what are you talking about? Freedom? I didn't hear clearly, say it again?

“......”

Looking at the green short sword suspended above their heads, the three flat-headed brothers all showed a look of horror, and they were all silent, not daring to say anything more.

"Moo!"

At this time, Lin Yuan smiled coldly, which means that there are any other conditions? Why don't you say it? If you don't give you some color to see, you really want to kick your nose, recognize your identity, and in the future, I will honestly stay on this spiritual mountain for this king, who dares to go out and run around, and there will be no forgiveness!

"Woo......"

The three flat-headed men curled up together and let out a pitiful wail, meaning that they knew the king.

"Moo!"

Lin Yuan smiled, which means that this is right, follow this king well, your benefits will be indispensable in the future, one day you will understand, being able to follow this king is your creation!

“......”

The three flat-headed brothers looked at each other with bitter faces, whether they were created or not they don't know, they know, this stupid cow seems to be very ruthless, if they are not disobedient, they may lose their lives at any time.

However, they didn't know that many years later, when one of the flat-headed brothers became a star in countless planes, he always told people that the greatest creation in his life was that he was fortunate to follow that supreme being back then......

After taming the three flat-headed brothers, Lin Yuan began to think about alchemy.

Now that he has figured out that those medicinal materials are available and those that can't, he can start trying alchemy.

It's just that if he wants to refine the pill, he still lacks one thing.

That is, Dan Furnace!

However, the ore on his body was not enough to build a Dan furnace, and he had to go out and collect some ore.