Soon, Chen Feng and the others were disappointed.

The cave here is very spacious, I don't know what trick is used, it can directly refract the sunlight from the outside world, and the walls are densely inlaid with fist-sized night pearls, these things are a priceless rare treasure in the secular world, but they are only placed here as simple decorative items.

In the cave is the same as outside, the air is clear and the space is thorough, but Chen Feng and the others started to walk from the foot of the mountain, and when they reached the halfway point of the mountain, Chen Feng felt a little helpless.

Although the things here are very complete, there is nothing that Chen Feng can look at. Although there are occasionally some rare herbs, or some human-level elixirs, or some four- or five-grade magic weapons or magic clothes, which are already good for these outer disciples, but for Chen Feng, it is useless at all, with treasures on his body, do you still care about these magic weapons.

"Looks like we're going to be disappointed again today. Chen Feng shook his head and said, although Chen Feng did see someone selling the magic circle just now, but the power of the magic circle, tsk, even the inner disciples couldn't stop it.

However, when he was about to reach the top of the mountain, Chen Feng finally encountered something that interested him, a demon core.

"What is this thing. Chen Feng pointed to a piece of crystal in front of him and asked, in fact, what Chen Feng cared about was not this crystal, but what was sealed in the crystal.

The thing in the crystal was half the size of a fist, crimson, round, and at first glance it looked like a solidified liquid.

Just now, Chen Feng sensed a trace of powerful aura, and only then did he lock his gaze on the thing in front of him.

Who knew that the other party didn't react after Chen Feng asked, and it seemed that he didn't want to deal with Chen Feng and the two at all.

"Excuse me, are you deaf?" said Ruta.

"What do you ask, can you afford it?" a young man sitting behind a desk glanced at Chen Feng and the two of them and said disdainfully.

"Oh, yes, it turns out that he looks down on us outer disciples. Chen Feng sneered, and took this crystal in his hand as soon as he stretched out his hand.

Chen Feng's actions immediately became hot for this young man, and he immediately slapped the table and stood up, but after seeing Chen Feng's two dresses, his face immediately showed a surprised expression, and then he smiled again, and Chen Feng was surprised by the speed of changing his face.

"Hehe, what do you two like?" asked the young man with a smile.

This is a monk of the fourth layer of the secret realm, who has cultivated to the point of seeing the subtlety, and is also an inner disciple, Chen Feng naturally understands that this person will change his face so quickly, all because of the dress of the two.

Wearing a five-grade magic robe and a five-grade magic sword hanging from his waist, although his cultivation is not very high, it has already shocked this young man secretly.

"Surely these two have a strong backstage?" thought to the young man.

"I just asked what this thing is?" Chen Feng asked, playing with the crystal in his hand.

"The two junior disciples really have a vision, what is sealed in this crystal is a big demon's demon core. The young man said immediately.

"The demon core of the Great Demon. Chen Feng was stunned, thinking of the tree spirit he had encountered in the Heiyuan Mountain Range, and at that time, he had absorbed a part of the tree spirit essence to cause his cultivation to advance by leaps and bounds. At that time, the tree spirit seemed to have survived the thunder tribulation, which was equivalent to the strength of the big demon, and the origin essence of the tree spirit was equivalent to the demon core of the big demon.

"That's a good thing. Chen Feng said secretly in his heart.

"Tower, is this the demon core of the Great Demon? Chen Feng asked secretly.

"Yes, but the essence of it has been lost a lot, and less than half of Liliang remains. Tower replied quickly.

"Less than half, this is the essence of a big demon's body, it can be regarded as a good thing, I don't know if the other party is going to sell it, by the way, if I buy it, is it useful?" Chen Feng asked again.

"Yes, you can absorb the demon power in this demon core, this is the origin essence of a big demon's body, and after refining, you can greatly improve your strength. Ta said lightly.

"Then this person doesn't refine and absorb?" Chen Feng was a little puzzled.

"You think that this kind of demon core human cultivator can absorb and refine it casually, it's not that simple, you can absorb it because you have cultivated the Immortal True Scripture, and these ordinary monks want to refine this kind of demon core It's just a dream. Ta said dismissively.

"It is very difficult for human cultivators to refine, so can other demon beasts refine this kind of demon core?" Chen Feng suddenly moved in his heart, and then asked.

"It's the same demon clan, so naturally you can. Ta said simply.

"May I ask what kind of demon core is this?" Chen Feng looked at "Hehe, I don't know, this demon core was also obtained by accident." The young man had a smile on his face and spoke very politely.

Originally, this young man also wanted to keep this kind of thing by himself, but later he found that he couldn't refine and absorb it, so he had no choice but to take it out and exchange it for something.

"I want this demon core, make a price. Chen Feng said with a smile.

"Is this this?" As soon as he heard that Chen Feng wanted to buy it, the young man's eyes immediately began to roll.

"Don't think about asking for a high price, to tell you the truth, this demon core is not even half of the liliang. Chen Feng said with a smile.

"This, I want to exchange for a sixth-grade magic weapon-level flying sword. The young man gritted his teeth and said.

"Haha, your appetite is not small, so let's do it, I'm only willing to give out a five-grade magic weapon-level flying sword. Chen Feng stretched out his hand as he spoke, and a flying sword kept hovering in his palm.

"Five-grade flying sword. ”

Looking at the flying sword in Chen Feng's hand, the young man's eyes suddenly showed a fiery gaze.

"Okay, deal. The young man gritted his teeth.

Chen Feng waved his hand, and the flying sword flew out and fell into the other party's hand, and he quickly put away this crystal.

Immediately afterwards, Chen Feng did not pause, but separated a trace of divine consciousness into the Immortal Pagoda.

"Four ears, a good thing for you. Chen Feng's voice sounded in the Immortal Tower, and the crystal he had purchased just now cracked directly in front of the four-eared spirit monkey, and a powerful demonic power emanated from it.

"Hey, it's a demon core. The purple electric silver light Jiao rushed over as soon as possible, and wanted to swallow this demon core in one bite.

"Stand down. Chen Feng said coldly, and the purple electric silver light Jiao suddenly felt a shock to his soul, and involuntarily retreated to the side.

"Four ears, you are a demon beast, you should be able to refine this big demon's demon core, right?" Chen Feng asked.

"Yes, yes, it can be refined. Si Er excitedly communicated with Chen Feng with his divine sense, looking at the demon core floating in front of him and constantly jumping excitedly.

"Okay, I'll give you this demon core, I hope you can improve one or two levels after refining, and then I'll release you to show me the mountain guard. After Chen Feng said this, he withdrew his divine sense.

The four-eared spirit monkey was still jumping around this demon core, only the purple electric silver light Jiao kept snorting a few times, but he didn't dare to say anything, he looked at the demon core enviously twice and then went to the side to sleep.

"You kid actually gave this demon core to that little monkey. Tower was a little surprised.

"That's right, I'm now the time to cultivate the Immortal True Scripture with my heart, if I refine this demon core again, I will definitely be distracted, and besides, wouldn't it be right for this kind of thing to be refined by demon beasts. Chen Feng said with a smile.

"This is a cave in Zuihou, I don't know if there will be anything good, this time I ran for nothing. Ruta was a little dejected.

"Huh, there are so many metal ores on this floor?" As soon as he entered the cave, Chen Feng saw pieces of rare metal ores on the counter, on the ground, and even on the walls.

"Tower, aren't you badly damaged, there are a lot of ores here, do you see if you can use them?" Chen Feng asked with a smile.

"Hmph, you think I'm something, you think I'm a magic weapon or a treasure weapon, how can this kind of garbage get into my magic eyes. Ta said with some unhappiness.

"Then you can help me pick out some better metal ores. Chen Feng said.

"What are you buying this for? There's no good stuff here. Ta said dismissively.

"Be prepared, store some metal ore in advance, and when my cultivation is enough, I will practice the method of refining weapons in the future. Chen Feng said lightly.

"Okay, I'll pick it for you, well, this is Da Luo Jing Iron, the grade is good, buy it." ”

"And that black ore is called black lazuli, it's not bad, it's suitable for you, buy it. ”

"There are also Xingchen Steel, Xuantie Steel, tsk, there is also a psychic stone here, although the grade is not high, but it is not bad. ”

"This is the fine iron pith, this is the iron phantom sand, and this piece of Moro stone. ”

"And ......."

Listening to the tower constantly quoting metal ores one by one, Chen Feng immediately stepped forward to ask about the price, and then bargained and bought, and soon more than a dozen metal ores were loaded into the Immortal Tower.

"Oh my God, this is Ziyao Copper Essence, how can there be such a thing here, boy, you have to buy this Ziyao Copper Essence whatever you say, you really can't grab it. Suddenly, the tower's voice fluctuated, some surprised, some excited, and some delighted.

"What Ziyao Copper Essence, are you talking about this purple copper ore? Chen Feng looked at a fist-sized purple copper lump placed in the middle of the wall and asked.

"What kind of copper ore, this is a good thing, even in the fairy world, it is also very valuable. Ta couldn't help but say.

"No, you won't lie to me, will you?" Chen Feng was a little skeptical, but began to open his mouth to buy it.

"Senior brother, please bring that piece of copper ore over. Chen Feng pointed to the copper ore in front of him and said.

"Oh, do you want to buy this ore?" The owner of this ore was a middle-aged man who looked a little kind, with the realm of the fifth layer of the secret realm, and was looking at Chen Feng curiously at this time.

"yes, I want to see it. Chen Feng nodded.

"Yes, you can take it yourself. The middle-aged man laughed.

So Chen Feng stepped forward and stretched out his hand, but he didn't move, and he tried hard, but he still didn't move.

"Hey, it's so heavy. Chen Feng was a little surprised, and began to gradually increase the number of liliang, and finally this fist-sized copper ore was picked up by Chen Feng.