Li Changfeng feels very happy now. In two and a half months, while avoiding areas where demon beasts were active, he found several more refining materials.

This made him very happy, and he had the feeling that a poor man was rich. Now, he returned to the valley where he had been absent for a long time, and was sitting on his bed studying the materials.

Ever since Meimei Feng had suffered a lot, he realized his crisis, he had too few cultivation materials in his hands, and the further he went, the bigger the gap between him and those regular cultivators.

In terms of exercises, the only way to practice is the key to the exercises during the Qi training period, what to do in the future, how to build the foundation, even if you can build the foundation, where does the key to the exercises come from after the foundation is built?

In terms of pills, it was completely blank, and I didn't know where to think of it.

Refining? It's annoying to think of this, and the basic refining tools introduced in the training chapter are too basic, only the introduction of some materials and runes, and nothing else, how can this be refined?

You can only rely on yourself!

"It has been detected that the energy is sufficient to meet the upgrade conditions. The system starts to upgrade, it will stop working temporarily, the system starts to shut down, countdown, three, two......"

The sudden voice interrupted Li Changfeng's contemplation, and he couldn't help but be shocked:

"Wait, wait, haven't you already been upgraded, how can you be promoted again?"

"It is detected that the energy is sufficient, and the conditions for the second upgrade are met, and the system will start to upgrade again, and the answer is complete. The system replied.

"Where did you get the energy, didn't you say that it wouldn't be automatically absorbed without instructions?...... You've stolen my vitality again, no wonder I'm practicing so slowly!" Li Changfeng was so angry that he was about to go crazy.

"Follow the host's instructions to absorb energy, the system executes correctly, please listen to the playback. ”

Li Changfeng's own voice came from his mind: "What you have gained from cultivation, you will be given half of it." ”

"That's what allows you to replenish the energy you have consumed, and when you fill it up, you stop, why are you still addicted. Li Changfeng heard the toothache and said with a snort.

"The host's instructions are unknown, the system executes correctly, and the answer is complete. ”

Li Changfeng was speechless.

......

There is no hope for cultivation. has been "stolen" so much vitality, who knows when it will be able to break through the fourth layer to the fifth layer. If you want to upgrade to enhance your strength, don't think about it in a short time.

Looking at the pile of training materials in front of him, Li Changfeng secretly felt ruthless in his heart: Then refine the weapon, Lao Tzu refining the original son pops up, and it won't kill you!

Thinking of the original son and bullet, he suddenly perked up: yes, who said that the training tool can only refine some swords and swords and the like, I have crossed over, knowledge is power, the power of those guns and cannons is not small, there is a manufacturing method in the system database, I will think of a way, use the method of training the tool to practice it, it should have some effect.

Just do it when you think of it, Li Changfeng flipped through the booklet, looked at the materials and began to ponder.

Fire stone, a fire-attribute material, is generally generated in the depths of the volcano, brittle, and the pro-mana is specific to the fire attribute, which is used for grinding and embedding into the spirit rune.

Due to the large amount of fire elements contained in this material, it cannot be in contact with water element materials, otherwise it will cause elemental confusion and uncontrollable consequences.

"If the elements are chaotic, they should explode, and it's the same principle as gunpowder. Hehe, good thing, at least you can make a grenade to play with. ”

Li Changfeng held the booklet in his left hand and a large red fist stone-like material in his right hand, his eyes shining. I didn't expect to find a suitable material all of a sudden, and I was immediately overjoyed.

Black platinum, metallic material, soft, lightweight, medium degree of affinity, associated with fire stone, high temperature resistance, strong ductility, can be combined with other materials to refine the device, generally used for fire attribute casters used in the spirit weapon, can effectively reduce mana consumption.

"That's not bad, you can consider alloying it with Xuantie and see if you can make a gun. Nodding, he set a piece of black material aside.

Wind Capture Stone, a mixture of water and wood wind attribute materials, is generally generated in the land of the Windy Canyon, with a brittle texture and medium affinity, and is used for embedding into runes after grinding, which has a good acceleration effect on flying spirit weapons, and has a limit on the number of times it can be used.

This material is highly compatible, and can be used with all attribute materials except fire attributes, which has a certain mana saving effect.

"Accelerate, it's a pity that I don't have a flying spirit weapon, so I can't think of how to use it for the time being. A piece of cyan material was set aside.

Scorched wood, wood attribute material, generated by a variety of spirit wood broken branches buried in the ground with abundant elements, the quality is determined by the length of burial time, at least 10,000 years to form, soft, high degree of affinity, used for grinding and embedded in the rune, can increase the degree of pro-law of the spiritual weapon, greatly save mana, fire attribute magic weapon is not available.

Water Spirit Stone

Refined copper

Green barium ......

In general, they are relatively common low-level materials. Li Changfeng took stock with relish and studied it without sleep or food.

......

Three days later.

Li Changfeng finally waited for the system to turn on, and was immediately overjoyed, and hurriedly called up the arms data in the database to take a closer look......

"The principle of grenade is not complicated, let's try it first. ”

Do it when you think of it: First, use shaping to make the black iron into a grenade shell, which is in the shape of a turtle shell. Pour in blast stone powder and separate the top with small pieces of wood.

Small wood chips are ordinary things, with very low affinity for the elements, and they are very good for use as partitions. Then pour the water spirit stone powder on the small wood chips, the water spirit stone is a water attribute material, which is just used to detonate the fire stone.

Screw the cover with a thimble cover, the exposed part of the thimble is stuck with a circlip to ensure safety, remove the circlip and throw it out when used, the thimble is stressed to push off the partition, and the hot stone powder and the water spirit stone powder contact explosion.

The grenade was made, egg-shaped, just the size of a hand, the black iron shell was dark and shiny, and it looked very good.

After admiring it for a while, his face turned grim, he coughed, and threw himself at the experimental site set up a hundred meters away, and the person hid behind a big rock......

"One, two, three, four, five...... counted ten numbers and still hadn't exploded, Li Changfeng was in a hurry, what was the situation, why didn't he explode? I was just about to go and see it......

"Boom......" There was a loud bang.

Li Changfeng was half cold. It took so long to blow up, no matter how powerful it was, it would be in vain.

I looked at the explosion site in frustration, and the effect was good, the wooden figures and stones placed within 20 meters around the explosion site were all swept away, and the fragments were still lethal 500 meters away, deeply embedded in the body of the tree.

It's just that this time is so long that people can't laugh or cry.

In previous experiments, the reaction time between the water spirit stone powder and the fire stone powder is extremely fast, which should be faster than the time for gunpowder to burn.

What is the reason for that? Li Changfeng played with the fragments of dark iron that had been pulled from the tree and fell into deep thought.

After a long time, his eyes suddenly stopped on the dark iron piece in his hand, patted his thigh, and suddenly realized:

This dark iron is the material used to make spiritual weapons, and the density and hardness are also considered to be the top among low-level spiritual materials, and the grenade is so small that it is still hollow, and the weight is dozens of catties.

Using it as a grenade shell, the fiery stone can break it, which is already remarkable, and it takes a long time, which is understandable.

If you find the reason, it will be easy to do, and find a piece of refined iron that was specially refined from ordinary iron ore in order to make an iron pot for yourself.

As for where the iron ore comes from, it is not difficult to find this thing on the mountain, out of the valley to the left, over a small hill, there is a small peak in front of it, called "Shit Peak".

Of course, the stones of the entire mountain peak cannot be all iron ore, but some of them are. I brewed it like this and made another one.

"Boom......" Another loud bang.

The results were examined, but it was found that the power was much smaller, only half of the Darkiron grenade.

It's easy to guess the reason, the Xuantie shell, the fiery stone has been held by the Xuantie for a long time, and it has been brewing for a long time, and this explosion is naturally extraordinary.

The fine iron shell played the role of a stuff, and there was not even a single fragment after the explosion, and it was all vaporized by the energy of the fire stone. The advantage is that the detonation is extremely fast, except for the time it takes to fly through the air, and the object will explode on touch.

"Well, there are no fragments, so add some fragments to it, and use dark iron to make small thin pieces of ginseng in the fire stone, I don't know how the effect is?"

I tried it, but the grenade was too small, it couldn't hold many flakes, and the lethality increase was limited. If you zoom in, it's inconvenient to carry, so you have to do it first.