A faint black flame emerged from Li Yutong's palm, and it carried a cold aura, which did not look like a flame at all.

"True vitality fire? How could it be like this? Sister Tongtong, you are only at the first level of Qi training! How can you activate the true vitality fire? Moreover, my true vitality fire is all blue, and yours is

Why is it black! Moreover, I can't feel the temperature of your vitality and true fire, but there is a faint coldness. What on earth is going on?"

Seeing the black vitality fire in Li Yutong's palm, Lin Feng observed it very carefully and asked.

"Lin Feng, I don't know either. Since yesterday, after the vitality in my body began to accumulate in my Dantian, I felt the breath from my body pouring into my Dantian one after another. Later, a formation of energy was formed in my Dantian.

When such a trace of black flame came, I also saw you using the true fire of vitality to refine weapons and pills, so I tried to lead this trace of black flame into the palm of my hand. I didn’t expect it to really come out..."

Li Yutong controlled this trace of black fire to dance in the palm of his hand, and then took it back.

"It's amazing! Sister Tongtong, I think it may be related to your special physique. Your physique is pure yin, so there is already strong yin energy in your body. Therefore, you have just practiced qi.

Layer, the power of Yin Qi is injected into the Dantian, forming this black flame. Your black flame should be Yin Fire! There is no breath of fire, but it is full of coldness, so it is most suitable to call it Yin Fire.

"

Lin Feng came up with this explanation based on Li Yutong's special physique. However, this is a good thing for them. After all, the faster Li Yutong practices, the more places he can help Lin Feng in the future. Extremely

It is possible that they are the only two cultivators left on the entire earth.

"Okay! Sister Tongtong, don't worry about the Yin Fire. Anyway, it's the ability derived from the Yin Qi in your own body, and it won't do any harm to you. Hehe! Let me show you something good first...

"

Putting aside Li Yutong's Yinhuo problem, Lin Feng took out three black iron darts and a mithril dagger that were turned in at the concert from the Shenshui Space.

Ding ding...

Lin Feng touched the dagger and the dart, and made a very clear sound. Li Yutong's eyes were also very poisonous. When he saw the three darts and the dagger, his eyes lit up: "Lin Feng, what are you doing?

Where did you get it?

Thing? This dart is light and thin, and its texture is very hard and sharp. It is obviously very extraordinary, and this dagger is even more extraordinary. Why do I feel that there is a force on the dagger that absorbs the vitality in my body?

"

"Sister Tongtong, you are quite knowledgeable. These three darts are made of black iron, and the dagger is even more amazing. They are all made of mithril." Lin Feng said with a smile.

"Dark Iron? Mithril? What are they?" Li Yutong did not have the memory of Lin Feng's cultivation inheritance, so he had no idea about Dark Iron and Mithril.

"Let me give you an analogy! Look at the steel over there. I have worked so hard to refine it, and I can only extract a tiny bit of refined iron from it. This refined iron is only the lowest grade material required for refining flying swords.

That's all. This black iron is the most suitable material for refining flying swords. Compared with fine iron,

I don’t know how many times higher Tielai is. Not to mention Mithril. As you just felt, the absorption of vitality and spiritual energy is almost 100%. You only need to add such a small piece of Mithril to the refining flying sword.

, it can double the properties of the flying sword!"

Lin Feng made a simple analogy, and Li Yutong immediately understood the preciousness of these black iron and mithril, and said in surprise: "Lin Feng, doesn't that mean that you don't have to work hard to refine refined iron now, as long as

Can you use these dark iron and mithril to refine flying swords immediately?"

"Forehead……"

Hearing this, Lin Feng could only smile bitterly and said, "Theoretically, it can be like this, but I am only at the third level of qi training now. With my true vitality fire, I am afraid it will be difficult to combine such hard black iron and secret...

The silver is refined."

This is also Lin Feng's biggest headache. The density and hardness of black iron are many times harder than fine iron. It is so difficult for Lin Feng to refine ordinary steel. To refine black iron and mithril,

I'm afraid I have to wait until the Yuan Qi True Fire reaches the foundation building stage to be able to have such power.

"Ah? Doesn't that mean that we have such good weapon-refining materials, but there is no way to use them?" Li Yutong also said disappointedly.

"Yes! It's like guarding the treasure mountain in vain, but I still have to give it a try. What if my true fire of vitality can melt this black iron?"

Picking up a black iron dart, Lin Feng held his breath and concentrated, summoning his cyan true fire from his dantian, and then burned it blazingly on the black iron dart.

Today, Lin Feng's vitality in his Dantian is relatively abundant. After practicing meditation every night, it has become more and more solid. Therefore, the power of the vitality true fire has also increased. From a trace of flame before, it is now a bunch of blue true fire.

When it catches fire, the temperature of the core flame is estimated to reach tens of thousands of degrees.

Sizzling...

The true fire of vitality burned on the black iron, causing the black iron to make a sizzling sound, but it seemed to be too early for it to be melted.

"Sure enough, Sister Tongtong, you see that my true vitality fire is powerful enough now. But when it is burned on this black iron, there is no movement at all, and it is impossible to melt it even a little bit."

Sighing, Lin Feng saw that the black iron could not be melted as expected, so he reluctantly picked up the mithril and burned it with the blue vitality fire again.

But this mithril seemed to be of a higher level than the black iron. Lin Feng didn't even hear a sizzling sound. The mithril dagger was motionless in the blue flames, and even used this flame to kill Lin Feng.

The vitality in Feng's body was absorbed.

"No! The mithril dagger can't be burned. Hey! Sister Tongtong, it seems that in the short term, I will still have to concentrate on condensing fine iron. However, fortunately, the power of my vitality real fire has increased again.

It is estimated that in another three to five days, all the remaining steel will be condensed into refined iron."

Lin Feng sighed and was about to move the steel to the side for refining. Li Yutong curiously picked up a black iron dart, a trace of black fire arose in the palm of his hand, and said to Lin Feng: "Lin Feng

Feng, why don't you try using my Yin Fire?"

"Sister Tongtong, you only have a trace of Yin Fire, and it is even weaker. You must not..."

Lin Feng, who didn't take it seriously, hadn't finished speaking yet, and his eyes were about to vomit out, because he saw in the palm of Li Yutong's hand, the weak Yin Fire in his mouth melted the black iron in one go. (To be completed.)
Chapter completed!