Xu Nian's arm trembled constantly, and there was not much spiritual energy and gang qi left in his body.

For him, the cost of this battle is undoubtedly very huge, and of course, the harvest is also very rich.

Xu Nian walked in front of the giant dragon's half-cut body and took out the crystal nucleus from the corpse.

"Wind Attribute Crystal Nucleus!" Xu Nian had a smile on his face.

What he cultivated was the wind sword technique, and now that he had obtained this wind attribute crystal nucleus, it would undoubtedly help him much stronger than other attributes.

"If you know how to refine the weapon and inlay this wind attribute crystal nucleus on my sword, then my wind swordsmanship will be even more powerful!" Xu Nian said to himself in his heart.

However, refining weapons is not so simple, and it is hundreds or even thousands of times more difficult to become an instrument master than to become a cultivator.

Before becoming an instrumentalist, one must first be a cultivator, and secondly, one must have a strong soul and an affinity for fire.

Because the most difficult part of the armor is that you have to control the powerful flames, so that you can melt the hard metal and forge the weapon.

Everything in the world is made up of nine attributes: metal, wood, water, fire, earth, wind, thunder, light, and darkness.

Whether it is a human, a demon beast or a foreign beast, it is also the same, they all have their own biased attributes, which may be one or more attributes.

It's just that this attribute is not obvious, and you need to keep digging it yourself.

If your physique is suitable for the water attribute, and you prefer to cultivate the fire attribute, then your cultivation speed will be very slow.

Xu Nian's rapid progress in the wind system sword duel just confirmed that his affinity in the wind attribute is very good, and secondly, the Overlord Fist also confirmed that his affinity in the thunder attribute is also not weak.

As for the fire attribute, the Thunder Fire Overlord Fist just now may prove that Xu Nian has a fire attribute in his physique, but whether he really has a super affinity still needs to be explored.

After all, to become an instrumentalist, the requirements for affinity are quite high.

"Boy, do you want to learn to refine weapons, you said it earlier, I can teach you!" However, just as Xu Nian's thought of becoming an instrument master was suppressed, the voice of the Night Heaven God Emperor suddenly sounded.

"Senior, do you know how to refine weapons?" Xu Nian suddenly said in surprise.

"How many times have I told you, calling me the Empress, as for you asking me if I can refine weapons, aren't you joking, all over the world, and I can't do things with the Night Heaven Emperor?"

"Yes, yes, the empress, you know how to refine weapons, great, teach me. Xu Nian said with joy in his heart.

In addition to the high requirements for oneself, the requirements for secrets are also very high, and this kind of secret is generally taught by the master in private, so even if ordinary people want to learn the refining tool, they are not allowed to enter.

"Boy, don't be so anxious, when you go out of this Jade Cave Heaven, I won't be too late to teach you, and secondly, if you can get that golden black fruit, it will also be of great help to you in cultivating the art of refining. The voice of the Night Heavenly God Emperor sounded.

Xu Nian was very excited when he heard this, since the Night Heaven God Emperor opened his mouth to teach him, then he naturally met the conditions for becoming an instrument master, and he believed that the refining secret taken out by the Night Heaven God Emperor at this level would be against the sky even if it was placed in the mortal realm.

"Golden Wuguo, it seems that I have one more reason why I must get you. Xu Nian said to himself firmly, and his blood boiled deep in his heart.

While Xu Nian was excited, the Night Heaven God Emperor also felt a sadness in his heart, and said in a voice that Xu Nian couldn't hear: "I didn't expect that this kid has a super affinity for the four attributes of wind, thunder, earth, and fire, what does this mean?"

In the divine realm, the earth attribute is also called the earth attribute, and the four attributes of wind, thunder, earth, and fire have a profound meaning.

And a person who used to have great respect for the Night Heaven God Emperor was this kind of physique, so at this moment, when she saw that Xu Nian had this kind of physique, she couldn't help but evoke some memories in her heart.

"Xu Nian, are you okay?"

Han Xin and Yun Lan had also come to Xu Nian's side at this moment and asked with concern.

"It's okay, it's just that the loss is a bit big, but it's not in the way, let's go into that cave and see what it is that can cause the three-headed beast to fight." Xu Nian said with a smile.

Now that he heard that he could refine weapons, he didn't care about any injuries.

You must know that the status of the refiner is extremely high, not to mention the refiner grandmaster, even if it is a great refiner, or even a small refiner can walk sideways in the Heavenly Scar Empire.

Alchemists are also divided into levels, which are divided into five levels: Refining Apprentice, Small Refiner, Great Refiner, Refining Grandmaster, and Refiner Emperor.

Each level is also divided into nine stars, but if you want to advance, it is a hundred times more difficult than cultivation.

Of course, in this way, the status of the refiner is naturally very high, the status of the refiner grandmaster is already comparable to that of a saint, and the refiner emperor is on a par with the battle emperor, or even higher.

One can imagine how high the status of this refiner is.

Soon, Xu Nian took Han Xin and Yun Lan into the ancient cave, and as soon as they entered the cave, the imaginary darkness did not appear.

The mountain wall is inlaid with nine night pearls, illuminating the entire cave as if it were day, and the space in the cave is also very huge, like a huge palace.

However, what shocked Xu Nian the most was that there were actually three pitch-black iron boxes in the center of this cave, and these iron boxes were all made of innate meteoric iron.

"The three-headed beast should have come for these three iron boxes, but I don't know what is hidden in these iron boxes. Yun Lan said.

Han Xin nodded, don't talk about anything else, just the three iron boxes in front of him are already worth a fortune.

"Just check it out. Xu Nian said with a smile, and walked towards the iron box after speaking.

Walking to the iron box, Xu Nian and the three of them suddenly felt the heavy aura coming from the iron box.

Xu Nian tried to lift one of the iron boxes, but to his shock, he couldn't move it.

"Damn, what kind of meteorite is this, so heavy?" Xu Nian couldn't help but scold.

Han Xin and Yun Lan on the side were also shocked, Xu Nian's physical strength they had seen before, and the iron box that could make him unable to move was even more impossible for them to shake.

"Quick, let's see what you have?" The audience outside the arena was also excited.

The treasure that the three beasts are fighting for, and they also want to know what is in it.

"Let's open it and take a look, fortunately there is no lock on this iron box, otherwise we really can't do anything about it. Yun Lan said with a smile, her eyes were full of anticipation.

Han Xin also held her breath, her beautiful eyes flashing with a fine light.

Xu Nian took a deep breath and stretched out his hand to open one of the iron boxes.

The moment the tin box was opened, it was dazzling and dazzling.

"This ...... Could this be?" Xu Nian and the three of them all looked surprised.