Ancient practitioners, who wanted to refine a magic weapon, often took decades or hundreds of years. The most time is spent on refining some ore materials, and the more precious materials, the more difficult it is to refine them.

However, what Lin Feng wants to refine now is not any precious ore material, but some of the simplest refined iron. Moreover, it is still extracted from the artificially purified steel, which is hundreds of times easier than that from iron ore.

"Hoo... I'm so tired. It takes so much energy to extract refined iron from steel!"

After holding on for another hour, Lin Feng reluctantly refined the steel weighing half a ton. In addition to some black scrap iron residues, Lin Feng finally got a piece of silver white refined iron. After weighing it in his hand, it probably won't weigh more than one kilogram.

"Isn't it? So less than a kilogram of refined iron has taken me two hours and almost all my strength to refine? This refining device is really a coolie! "

He felt that the vitality of Dantian in his body was scarce. Lin Feng received the vitality and decided to stop here today. He was unable to refine any more. After working so hard for two hours, Lin Feng could not get half a kilo of refined iron. Lin Feng really realized that it was not easy to refine utensils.

"Only half a ton of steel can refine a kilogram of refined iron. According to the inheritance experience. Even refining the lowest level magic weapon flying sword requires at least ten kilograms of refined iron. It seems that the ten tons of steel outside may not be enough! "

Knowing that refining steel to make flying sword was not something that could be done in one breath, Lin Feng was not so worried. He sat cross legged and recovered a little energy that had just been consumed. He got up and walked out of the alchemy room after collecting the silver white refined iron of less than a kilogram into the Shenshui space.

"Lin Feng, are you out? What about? Has the flying sword been successfully refined? "

Seeing Lin Feng coming out of the alchemy room, Li Yutong came forward for the first time and asked with concern. That towering chest, beautiful face and incomparable figure are a perfect goddess.

"Not yet. It's much harder than I thought. I'm afraid it will be a long war of resistance against Japan. It took me more than two hours to refine half a ton of steel, and the refined iron is less than a kilogram. "

Lin Feng said with a wry smile, "sister Tongtong, I'm afraid I'll have to spend the next week with these steels. It is estimated that within half a month, the prototype of flying sword can be refined. "

"Everything is difficult at the beginning! Lin Feng, didn't you also say that? You may be the last cultivator on earth. It's an immortal cultivation method. It's incredible to think of countless miraculous spells and pills. It's your first time to refine flying sword. Don't be impatient. Although I don't know what the practice is about, I know that no matter what I do, I'm anxious and can't eat hot tofu... "

Li Yutong came over with a smile and pasted it beside Lin Feng to comfort Lin Feng with concern. The woman's fragrance emanating from her is a very refreshing fragrance, very pure and clean. After smelling it, people seem to be in a paradise world without any troubles.

"Thank you! Sister Tongtong, I believe you have been around me to help me and encourage me. This flying sword will be refined successfully. Moreover, sister Tong Tong, in fact, you are a pure Yin body. You can also practice my "congenital Kui water formula". But the effect is a little worse, or I'll teach it to you now? "

After digesting many inheritance memories these days, Lin Feng found that although the most suitable cultivation method of pure Yin body is pure Yin attribute. However, Lin Feng's "congenital Kui Shui Jue" also belongs to the skill of Yin attribute. Li Yutong's pure Yin body can be cultivated.

"Really? Lin Feng, that means, I can become a cultivator like you now? " Li Yutong surprised the tunnel.

"Yes! Sister Tongtong, although my skill is not the best for you, it should not be much worse. Moreover, your pure Yin body is very suitable for cultivation. I'm afraid it's faster than me. It belongs to a constitution against the sky... "

Lin Feng nodded and then said awkwardly, "but now I don't have Peiyuan Dan on hand. If you want to teach the "congenital Kui water formula" to you, you must take a breath of vitality into your body, and then lead you to run the "congenital Kui water formula" for a week. "

"A breath of vitality? What needs to be done? Lin Feng, I cooperate with you. Moreover, if I become a cultivator, can I help you refine pills and tools together in the future? " Li Yutong trusts Lin Feng 100% and believes that he will not harm himself, so she will do whatever Lin Feng says.

On the contrary, Lin Feng said with a trace of embarrassment: "sister Tongtong, as long as you also cultivate vitality and true fire, you can naturally refine pills and tools. I'll teach you all this, but... It's the first breath of vitality. You need to... Mouth to mouth, doesn't it matter? "

Although Lin Feng has kissed Li Yutong more than once, after all, there are still differences between men and women. What's more, Li Yutong is such a national beauty like an immortal. Lin Feng's heart beats when he thinks of kissing Li Yutong.

On the contrary, when Li Yutong heard Lin Feng's polite inquiry, he couldn't help laughing. He was angry with Lin Feng and said, "Lin Feng! It's not like we haven't kissed? Are you still serious with your sister? And... "

Then, Li Yutong also looked like a peach blossom. She bowed her head slightly in shame. Bei's teeth bit her cherry lips and said, "moreover, Lin Feng, I'm afraid my sister will only be touched by a man in her life. If you don't kiss me, won't my sister die alone all her life?"

When the charming Li Yutong said this, he really had all kinds of feelings and flirtatious manners, and the meaning of having promised each other by example made Lin Feng both moved and excited. He couldn't help but pull Li Yutong's small arrogant waist over, and kissed him directly and affectionately without saying a word.

"Well..."

Feeling Lin Feng's familiar thick lips and dishonest tongue, Li Yutong also forgot his feelings, closed his eyes, immersed in this affectionate kiss, let go of all his precautions and completely handed himself over to Lin Feng.

"Congenitally sunflower water formula" is carried around in the great Zhou Dynasty to pass on merit! "

Sucking Li Yutong's small and gentle lips, Lin Feng enjoyed it very much, but he didn't forget the business. He operated the skill, mobilized the vitality in the Dantian, and began to pass on merit to Li Yutong.