Li Yuan looked directly into the old man's eyes, as if he wanted to see something in the other party's eyes.

After a while, Li Yuan finally exhaled and said in a deep voice: "Even if the speed of time is really different, there is no aura here, and it is impossible to cultivate, and no matter how long you stay, it is just a waste of time, so what good is there to talk about." ”

Li Yuan said this, but he was still a little looking forward to it, after all, it didn't take long to get the time agreed above, and he also thought that he could improve his strength as much as possible before that, so that he could have more confidence when the time came.

In addition, Luo Tian Da Jiao is also about to be held, and it is good to be able to improve his strength a little more during this time, after all, Li Yuan has heard many people say the importance of this Luo Tian Da Jiao, and they all say that the stronger the strength, the more opportunities can be obtained at that time.

"Although you can't cultivate here, you can use this time inside to improve your Heavenly Thunder, and I can also help you plan the direction of your cultivation in the future. The old man said.

"Heavenly thunder can still be improved!" This surprised Li Yuan.

The old man took a deep breath and said solemnly: "In our world, because there are too few people who have the power of heavenly thunder, naturally no one knows, but above Shenzhou, the fact that heavenly thunder can be advanced is well known." ”

"How is Lei going to advance that day?" Li Yuan said.

The old man squinted his eyes, looked at Li Yuan for a moment, and then said slowly: "You first put Tianlei in the palm of your hand for me to see." ”

Hearing this, Li Yuan immediately flipped his right hand, and a beating purple current appeared in the palm of his hand.

The old man put his fingers on his chin and observed for a while, then shook his head and said, "Your extremely cold thunder is still only at the most rudimentary level, no wonder it is so weak." ”

"This day of thunder, divided into primary, intermediate, advanced, three grades, and then upgraded will be advanced to the divine thunder, of course, not all thunder species can be advanced, only those thunder species on the divine thunder tablet can. ”

"Is the Heavenly Thunder in my body only a beginner now?" Li Yuan muttered, he couldn't be clearer about the power of this Extremely Cold Heavenly Thunder, it could be said that he was currently the strongest method, but this was only the primary level?

"Of course, the Extreme Cold Sky Thunder is also the thunder seed of the Divine Thunder Tablet, but in your hands, you haven't been able to exert even one percent of the power, not to mention anything else, can you use the Extreme Cold Power in the Extreme Cold Sky Thunder?" The old man gave Li Yuan a big roll of the eyes, as if the Extremely Cold Sky Thunder was a pearl on the other party.

"That's right, since this thunder is called the Extreme Cold Thunder, why haven't I ever found out where this extreme cold is manifested? Li Yuan touched his chin and muttered thoughtfully.

"That's because only when you reach the intermediate level, can you exert a trace of the extreme cold power of the Heavenly Thunder. The old man immediately explained.

"I see. Li Yuan slapped his forehead and suddenly realized.

The old man continued: "In fact, the thunder species that can ascend to the Divine Thunder Monument have their own unique places, just like the Gangfeng Divine Thunder ranked after the Extreme Cold Divine Thunder, which contains a very powerful Gangfeng power. ”

"What is the number of my extremely cold thunder on the Divine Thunder Monument?" Li Yuan asked curiously.

The old man smiled, shook his finger and said, "Your Extremely Cold Heavenly Thunder is not qualified to be on the list, only when it advances to the quality of the Divine Thunder, can it be regarded as the thunder species on the True Divine Thunder List." ”

Li Yuan nodded as if he didn't understand, and then said solemnly: "Okay, if you really have a way to help me upgrade the Extreme Cold Heavenly Thunder, I can promise you to expel the evil qi in your body for you." ”

"This is necessary, otherwise with your current power of heavenly thunder, there is no way to expel the evil qi in my body. The old man said casually.

Next, the old man began to explain to Li Yuan the advanced method of Tianlei.

It turns out that the heavenly thunder is to be upgraded through the method of sacrificing thunder, and this method of sacrificing thunder is difficult to say, and it is simple to say.

To put it simply, sacrificing thunder is actually to sacrifice some specific thunder attribute heavenly treasures to let the thunder species absorb it, so as to achieve the purpose of promotion.

This sounds very simple, but if you just name a kind of thunder sacrifice material, it will definitely scare even a Jindan stage monk away.

Because of these specific thunder attribute heaven and earth treasures, any one of them, it is something that the Jindan period monks can't get for it.

In addition, these heavenly and earthly treasures are all used for other purposes, some are used as the main materials for refining some high-quality pills, and some are used to refine thunder attribute magic weapons.

Therefore, under such consumption, these natural treasures are even more rare, and they can even be described as rare.

"What kind of heavenly and earthly treasures can be used to sacrifice thunder?" Li Yuan asked as he listened carefully.

The old man touched his beard and said with an embarrassed face: "Actually, the immortal doesn't know much, and those people in this Shenzhou may be more clear, so let's do it, the immortal will give you a list of a few I know, and if you have the opportunity in the future, you can also try to collect it." ”

After speaking, the old man waved his right hand, and used the strong wind to quickly carve seven or eight names on the ground.

Phantom Thunder Crystal, Thunder Spirit Bead, Thunder Jiao Neidan, Meteorite Thunder Po, Thunder Tooth Rice......

When Li Yuan saw the three words of Meteor Leipo, he was slightly stunned, and then asked quietly, "Is that all?"

"These are the heavenly and earthly treasures that I can think of at present for sacrificing thunder, of course, these heavenly materials and earthly treasures have strong and weak effects on the promotion of thunder seeds, as far as I said above, the best effect is Lei Jiao Neidan, followed by Meteor Lei Po and Lei Lingzhu, Lei Jiao Neidan needless to say, as a demon beast with at least six orders or more strength, Lei Jiao's demon pill can be said to be extremely precious, and it is also possible to upgrade the thunder seed in your body to a high-level heavenly thunder, and the other two are similar, it should not be much of a problem to upgrade to one level. The old man said seriously.

Li Yuan silently wrote it down, secretly happy in his heart, but also with some expectations.

As the old man's key mention, he carried the meteorite on his body, and it was the meteorite-like thing that Fang Tang gave him to use to cultivate the thunder method.

However, this still made Li Yuan startled, you must know that the value of the Falling Thunder Pop is definitely more than a rune treasure, and it is even about to catch up with the value of the magic weapon, such a treasure is actually only enough to make the Heavenly Thunder upgrade to the intermediate level!

According to what the old man said, the more difficult it is to ascend to the back, especially after advancing to the divine thunder, if you want to upgrade to the next level, it is more difficult than ascending to the sky, and when the time comes, where will you go to find these heavenly and earthly treasures that are more precious than the meteoric thunder?

Li Yuan shook his head with a wry smile, no longer thinking about what happened next, looked at the old man and asked, "As long as I have these heavenly treasures, can my heavenly thunder be upgraded?"