"That's pretty much it, but there are still some specific methods needed to sacrifice thunder, and I'll tell you about it slowly in the future. After finishing speaking, the old man flipped his right hand, and an old storage bag that looked like some years appeared in his hand, and after throwing it to Li Yuanyi, he said lightly: "This is left by those people who came in with me back then, and there are some heavenly and earthly treasures that can be used as sacrificial thunder materials, you can keep it first." ”

Li Yuan accepted it unceremoniously, then opened the storage bag and looked inside.

The contents of this storage bag have obviously been sorted out by the old man, they are all messy materials, not a lot, but some of them have been recognized by Li Yuan at a glance, among them is the cold iron needed to refine the Thundercloud Sword, and there are quite a few of them.

In addition, the Red Sea coral, the polar magnet, and the hides of the fourth-order demon beast Fierce Earth Beast were all materials for refining medium and high-level spiritual weapons.

These materials don't seem to be much, but if they are taken outside, they will be coveted even by the monks of the foundation building period.

"This old man is so generous?" Li Yuan was a little surprised.

But after thinking about it, he understood that these things may be very precious to him, but for a strong man of the realm of the old man, these things are no different from scrap iron, and they can't enter his old man's eyes at all.

"You can bring these materials back and sell them, or find someone to refine the spirit weapon, but it's best not to take them out and show them to others. After the old man glanced at Li Yuan, he said earnestly.

Li Yuan nodded, and then said with a smile: "Why don't the seniors directly help me refine these materials into spiritual weapons, so that they are more unstable?"

The old man looked at Li Yuan and said with a wicked smile: "Yes, but refining requires some effort, and after refining, I will finish one thing for you." ”

Li Yuan smiled bitterly, thinking that this old man was cunning enough, this was all good, so he chuckled and said, "Didn't the seniors still owe me a favor?"

"Let's talk about the refining later, I'll teach you the method of sacrificing thunder first, and you can start sacrificing thunder when you have time. The old man slowly walked to the side, and with a flick of his right hand, a cloud of black gas flew into the air, and after a while, a text appeared.

There is not much content in this text, mainly to explain how to sacrifice thunder, in addition to some precautions, such as when the thunder seed absorbs the sacrifice, you must not be in a hurry, after the sacrifice should be slowly refined and absorbed for a long time, otherwise there is a risk of explosion.

"Okay, you just take your time here, take note of it, this immortal still has some things to deal with, and I'll come here to find you in a few days." As soon as the words fell, the old man's figure disappeared in a blur.

Li Yuan looked up, only to find that the text in the air was actually condensed, as if it was printed in the air.

It took Li Yuan a full day and a night to fully comprehend all the methods of sacrificing thunder, and then he began to try to sacrifice thunder.

......

Three days later, Li Yuan, who was sitting cross-legged on the ground, slowly opened his eyes and looked at a pebble-sized and mottled strange stone with a tired look on his face.

After three days, he finally sacrificed this Bohai Thunder Pattern Stone, and let the Extremely Cold Heavenly Thunder Seed in the dantian absorb it.

Don't look at this Bohai Thunder Stone is only a little bit big, its value is no less than a high-level spiritual weapon, and even if someone is willing to exchange it for a high-level spiritual weapon, it may not be exchanged.

However, such a priceless Bohai Thunder Stone only provided a little energy to the Thunder Seed, which was far from enough to upgrade it to the intermediate level.

Drama Li Yuan deduced that if he wanted to make the Extremely Cold Heavenly Thunder rise to the intermediate level, like this Bohai Thunder Pattern Stone, he would sacrifice at least a dozen of them.

Li Yuan shook his head helplessly, took out a tooth-sized, rice-grained, and blue thunder light from the storage bag, put it back in the palm of his hand and began to sacrifice.

This Thunder Tooth Rice is even more precious than the previous Bohai Thunder Pattern Stone, and its value is almost worth the value of the best spiritual weapon.

But Li Yuan didn't hesitate, and used it to start the thunder sacrifice, if people knew about it, it would definitely be said that he was violent and ruined.

Li Yuan's current behavior can no longer be described as extravagant, which is even more outrageous than someone using the highest denomination banknotes as firewood to cook hot pot.

In this way, it took Li Yuan nearly ten days to complete the sacrifice of Lei Yami.

During this period, the old man of the ghost fairy came once, and after taking away the refining materials, he left alone, looking very mysterious.

Time flies, Li Yuan is like this, day by day in the boring and boring sacrifice thunder, during which perhaps because of boredom, Li Yuan suddenly released the four evil iron corpses in the Yin Soul Bag, trying to let them absorb the evil qi here.

The result was unexpected, these four evil iron corpses were not only able to absorb the evil qi, but also the netherworld qi.

In this way, the improvement of the cultivation of these four mutant iron corpses is very terrifying, and it is not an exaggeration to describe it as a thousand miles in a day.

Half a month later, the old man of the ghost fairy who saw the dragon and saw the end came again.

This time, he mainly wanted to see the growth progress of the thunder seed in Li Yuan's body, and by the way, he also brought something that surprised Li Yuandu.

"Five Thunder Rectification!, how can you have such a thing?" Li Yuan exclaimed in disbelief as he looked at the piece of Exercise Jade Slip that the old man had thrown at him, which had already cracked.

As we all know, this "Five Thunder Righteous Method" is one of the Zhenmen exercises that are not spread by the Heavenly Master's Mansion, and it stands to reason that it is impossible for the ghost fairy old man to get it.

"Hey, what's so strange about this, Ben Xian told you before, among the people who came in with me at the beginning, there was one who was the junior brother of the previous Heavenly Master of your Heavenly Master's Mansion, and he had a rubbing copy of the "Five Thunder Righteous Law" on his body, if it weren't for the fact that your Lei Fa only had half a bucket of water, Ben Xian would not have bothered to rummage through that person's relics. The old man said after giving Li Yuan a big roll of his eyes.

After hearing this, Li Yuan frowned slightly, and looked at the ghost fairy old man thoughtfully.

He didn't dare to believe what the old man said, if it was true, it would be fine, but if it was false, then there was only one possibility, this old man must have been a heinous demon before he came here, and these things were all the trophies he had snatched after killing people and stealing goods.

As soon as this thought came to his heart, Li Yuan suddenly felt a chill down his spine, and he had a terrifying feeling of being in the same room with a demon.

This had to make Li Yuan become vigilant, and even began to consider whether he really wanted to help him expel the evil qi in his body.

"Am I doing this to let the tiger return to the mountain, if he is really a demon with a great crime, with his current strength, he will inevitably harm the whole world after he goes out. Li Yuan's heart began to be entangled.

However, if you don't help the other party expel the evil spirit, then you can't leave here.

Just when Li Yuan was struggling in his heart, the old man appeared beside him in a flash, put his hand on his shoulder, and a mysterious force followed his hand and drilled into Li Yuan's body.

"What do you want to do!" Li Yuan's face immediately changed.