Jia Zhengjin tried to fill a glass of groundwater in an empty bottle and brought it to his eyes to examine it carefully.

【Clear groundwater】It has the effect of quenching thirst and cooling down.

There was no problem with the water, and after a sip, it felt like frozen mineral water in the fridge, but it was sweeter and tastier.

This is quite rare, so I took out a large number of empty bottles, collected more than 300 units of groundwater, and prepared to take it out for others to taste. You can also send someone back to the Holy Dragon City to give Tina and them a taste.

"Hiss~~" As he superimposed the groundwater on the virtual backpack, a voice suddenly sounded in the water, and then something slowly emerged.

Jia Zhengjin was so frightened that he hurriedly retreated, vigilantly raised his trident, ready to fight at any time.

As he watched, a strange snake with blue scales and a particularly smooth feeling in the underground river poked its head out and looked at him.

This snake has a round head, and according to theory, it should not be a poisonous snake. But Jia Zhengjin didn't dare to be negligent, after all, everything in the other world was unreasonable!

First of all, the appearance of snakes in underground rivers at this depth is already very unusual!

The snake in Hanoi doesn't move, and Jia Zhengjin doesn't move, and the two sides are like this, you look at me, and I look at you.

After a while, I don't know if I was tired or not interested in Jia Zhengjin, the strange blue-scaled snake plunged its head into the water, twisted its body and dived to the bottom and disappeared.

Jia Zhengjin breathed a sigh of relief, fortunately, this thing was not a threat to him. But they don't dare to wade across the river easily, especially when the water temperature is the same as that of an ice store, and it is difficult for a normal body to eat.

A few wooden frames were built to build a simple single-plank bridge, which passed directly from above to the other end of the underground river.

After arriving, he was even more shocked to find that there was moss everywhere on the ground, and even some strange plants.

There are too many challenges to common sense, which makes him a little numb. Therefore, I stepped on the moss and slowly continued to move forward, and after walking for a few hundred meters, I suddenly became enlightened.

A huge underground cave appeared in front of you, and under the illumination of the ball of light, a strange and beautiful colorful light appeared.

When Jia Zhengjin saw the source of the colorful light, his mouth couldn't close at all!

It's no smaller than the cave you pass by, but it's just as wide and spectacular. The most unbelievable thing is that all the rock walls around the cave are inlaid with various ores that sparkle in the light.

As far as he could recognize, there were silver, gold, diamonds, iron, and copper, as well as many, many ores that he had never seen before, densely packed like ornaments, dotting every area.

"This vein is too big to be outrageous, isn't it?" Jia Zhengjin couldn't help but swallow his saliva, only to feel his heart beating wildly. Walk to the side and reach out to touch it, the feel of those minerals is extremely real, and it is not a dream!

Not to mention the mines he knew, he took a pickaxe to find some ores that he had never seen before, and chiseled out some samples to understand.

After carrying the [Mana Ore], it can increase the elemental affinity of the magician, making it easier to cultivate magic!

[Power Ore] can increase your strength and increase your combat power after carrying it!

Omar Ore is a magical additive mineral that can make the weapon even sharper!

Karna Ore is a magical additive mineral that makes the armor stronger!

【Titanium ore】Rare metal ore, which is quite useful.

The attributes of these ores made Jia Zhengjin quite excited, magic ore and power ore can be used to train magicians and warriors, and if there are enough ores, you can make elites in batches. Combined with the system of recruitment, you can have a more powerful army.

Two additive minerals, which can make weapons and equipment more powerful, are also necessary.

And the titanium ore made him even more excited and difficult to suppress. Because the titanium alloy made by smelting titanium ore is an essential material for a series of ultra-high-tech mechas, battleships, and spaceships in the later stage!

The rest of the ore is good to say, the titanium ore must be taken away!

He was quite excited to start looking for titanium ore to dig and collect, but found that the ore was digging more and more, and there were more ore veins with larger reserves behind the rock wall!

With such a large vein, let alone by yourself, even if a force is stationed here, I am afraid it will take a long, long time to finish digging. I have limited time, I have to leave before dawn, if I am immersed in mining, won't I not find the secrets of the deep place?

In a place like this, normal people will definitely not be able to enter, and it is impossible for other forces to come in and mine.

As long as you don't die at the hands of the Dark Dragon, you can come back at any time in the future and transform this place into your own exclusive mine!

For now, let's leave these ores alone and find out the secrets of the deepest places!

I finally suppressed my impulse and put away the pickaxe. Jia Zhengjin was very uncomfortable and forced himself not to look at this amazing vein, and finally found another passage hidden in the vein.

Moving forward along the passage, there are still a large number of ores on the rock walls on both sides that are eye-catching, which is not enough to hook Jia Zhengjin's desire to mine.

Finally overcoming this desire, he forced himself to move forward, and finally left the vein area, and an even larger underground cavern appeared in front of him.

The previous two caves were incomparable to this huge cavern. Jia Zhengjin found himself as if he was standing on a section of the cliff, except for the road behind, up and down, left and right, and in front of him, there was no end in sight.

"Where should I go now?" The underground cavern in front of him made him confused. After thinking about it for a moment, "Since it's an extremely deep place, it should be going down all the time, right?" But I've been flying down for I don't know how long, do you want to continue flying down now? When is it the end?"

Come to think of it, it's already two o'clock in the morning. If you hesitate any longer, it may be dawn!

If you don't know the secrets of the deep place, I'm afraid that Jia Zhengjin's curiosity will not be satisfied, and he will feel very uncomfortable after leaving.

Gritting his teeth, he jumped down the cavern and continued to fall at breakneck speed, plunging into darkness.

But this time it was very fast, and it took more than ten minutes to find the ground. Quickly use the aircraft to control the balance and land safely, and once again summon a ball of light to illuminate the surroundings.

At the moment when the light appeared, something suddenly flashed in front of me. Jia Zhengjin hurriedly raised his trident and looked around vigilantly.

It's just that as far as the eye can see, you can't see anything but rocks.

"Is it delusion?" Jia Zhengjin, who turned around cautiously and did not find any suspicious creatures, reached out and rubbed his temples, suspecting that he had just been deceived by his senses for a moment.

"Let's look for other passages!" he began to investigate, illuminated by the orb of light.