Although the underwater visibility is not high and the landform is complex and full of aquatic plants, it is difficult for predators to detect fish hiding here. However, in the microscopic identification of data-based vision, this group of spiked manta rays is still invisible.

Rows of data and annotations slide across the field of view, after removing useless information such as seawater temperature, brightness, seawater flow rate, etc.

The digital vision not only marks the position of each manta ray, but also projects their outlines on the retina.

Instead of disturbing these big fish, Alvin quietly returned to the water. He slowly stepped on the water with his feet and gently adjusted the position of the raft until it was directly above the center of the manta ray group.

Taking a gentle breath, he pushed the four or five large rocks carried on the raft into the sea, and then quickly took out a long, thick iron piece and an iron rod from his backpack. Ivan also followed the rocks and slid in again.

in water.

underwater.

The moment Aiwen entered the water, he held the iron piece in one hand and the iron rod in the other, and used all his strength to knock them together. The falling speed of stones in water is much slower than that in air, and the propagation speed of sound waves in water is

But it's much faster than in the air.

"Ding dong, jingle dong, jingle dong"

Almost at the same time, a huge noise and rocks fell on the heads of this group of manta rays.

Frightened by the sudden "attack", the spikes on the tails of a group of timid manta rays instantly turned red, raised high and then shot out violently.

The fins of the fish stirred up the sea currents and stirred up a large amount of sand and dust on the bottom of the sea. The manta rays disappeared without a trace in an instant.

Ivan floated on the surface of the sea, and after the sand and dust had completely settled, he dived back into the bottom of the sea. Sure enough, he found three or four red spikes lying quietly on the bottom of the sea. As for the other ones, I don't know where they were launched.

Done!

Ai Wen was overjoyed. He originally just had the idea of ​​giving it a try, but he didn't expect that this clumsy strategy really deceived them.

I started working directly and without any accident, I harvested four red spikes, two long and two short.

As an auxiliary material for preparing pharmaceuticals, although the amount of these spikes is small, it is irreplaceable. Now with these gains, there is no need to worry about shortages in the next few years.

"Anyway, I went out to sea, so I collected other materials needed for the Black Sea potion. Basically, the raw materials for the Black Sea potion can be found in the Black Sea. I hope I can gain something today."

Since there was no store open in the morning, Alvin decided to spend today here. Trying to find all the weird and weird parts of the potion formula that are almost impossible to buy in the drug store.

So Alvin began to repeat the process of diving - watching - returning - changing places - diving again. It has to be said that the biological resources in Leopold's sea area are very rich. By the afternoon, hexagonal blue starfish, three kinds of unique seaweed

, black line sea urchin and other materials were found one by one.

The last remaining main material is shark teeth.

Alvin didn't see it this time. Well, he didn't want to see it in the sea anyway, especially when he was alone on a raft.

Because in the sea area of ​​​​Leopold, sharks are caught by fishing boats from time to time. When the time comes, just go to the dock and wait. Even if there are no fresh ones, you can find them by going directly to the nearby place where the fish are processed and discarded.

It's just that the effect is slightly worse.

The collection task is generally completed.

But what Ivan didn't expect was that there were a lot of "unexpected surprises" in the process of collecting raw materials, such as beautiful shells, a rusty copper key from someone's house, and a small fiery red coral that even had no appearance.

I harvested a few pearls that were not very good.

Although it was not worth much money, it gave him a different kind of satisfaction. In his excitement, Alvin had already turned his medicine-collecting trip into a treasure-hunting trip.

He kept searching, and before he knew it, Aiwen had moved far away from the original body of water, and the color of the sea water gradually deepened.

"call!"

After getting out of the water with no results and taking a look at the skewed sun, Ivan decided to dive one last time and return directly regardless of whether he had gained anything or not.

Years of training in the Knight's Breathing Technique has allowed Alvin to hold his breath underwater for much longer than ordinary people, and dive to much deeper depths. This allows him to go to places that ordinary fishermen cannot reach.

Determined to test his limits, Aiwen held a stone and walked downwards along the ever-extending seabed. He stopped only when his field of vision was gradually restricted, and he could only barely see things by relying on his digital field of vision.

Even his extraordinary strength cannot allow Aiwen to stay underwater for a long time, so he seizes the time to search for possible "treasures".

Looking around, even though it is hard to see sunlight here, in addition to the rocks and gravel on the seabed, there are still sea fish and crustaceans of different colors and shapes wandering among the rocks. The extraordinary world has obviously created a tenacious life to match.

"what is that?"

Soon, under the guidance of his digital vision, Ivan discovered a shell from the cracks in the reef, a shell that was bigger than a pumpkin.

The shell is covered with various parasites and is almost integrated with the reef next to it. If it weren't for the help of digital vision, Alvin wouldn't have been able to spot it even if he passed by.

He took the dagger tied to his calf in his hand, inserted it through the gap in the shell, and pried it hard. A soft pearlescent light flowed out, one, two, three, one, two, small, a total of three large black pearls were covered with it.

The dagger was picked out.

Although Ivan is not very knowledgeable about jewelry of this era, he still has basic common sense. Even based on the lowest estimate, these three black pearls in excellent condition are worth at least a hundred gold lions.

According to the prices of this period, a six-year-old military horse at its peak is worth only one hundred gold lions. A strong military horse is more valuable to a knight than owning a mid-to-high-end car in his previous life.

face.

Taking the income of ordinary people as an example, a noble attendant who is considered a high-income earner usually earns three silver bulls for one month, which can be converted into one gold lion.

One can imagine how much wealth this is.

Suppressing the joy in his heart, Alvin carefully put the harvest into the small pocket on his waist, threw away the stone and was about to resurface.

Alvin, who was a little carried away, apparently forgot that he was on the dangerous seabed, not a jewelry store with good service.

The rising momentum was stopped by the sudden slight tightening of the ankle.

Ai Wen thought he was entangled in seaweed, but he couldn't break free even after trying hard, and his heart skipped a beat.

Gulu, Gulu

Ai Wen looked back and almost let out all the anger in his mouth in shock.

A huge octopus with a body that looked like a reddish-brown reef had lurked next to Alvin at some point. What was wrapped around his ankle was a thick arm that was more than three meters long.

When faced with a sudden change, Ivan did not struggle in vain like ordinary people. The training he received since childhood told him that if he panics before fighting an enemy that is stronger than himself, the outcome is doomed. This is what happened when facing a ferocious lynx.

, it was the same when facing the big octopus today.

The big octopus is obviously impatient. After entangling its prey, it clings to the reef with its other arms and legs and slowly pulls Alvin down, as if it wants to drag him to the deep sea and drown him before enjoying a feast immediately.

In critical moments, every escape plan pops up in your mind and is quickly rejected.

But no matter how fast the thoughts in his mind are, they can't reach the body of a trainee knight who has formed a fighting instinct through hard work. Driven by the strong survival instinct, Alvin did not resist the drag of the big octopus, but used this force to push down the reef.

Backlash.

Because he knows that there is no way he can outrun this cunning predator at the bottom of the sea. The only way to survive is to kill it! It is just a huge ordinary sea creature, not a violent animal. Whoever dies will win.

For sure.

Although the big octopus is very smart, it can't guess what Ivan is thinking. When he sees him swimming over on his own initiative, the remaining tentacles open up, just waiting for the prey to be brought to his mouth, and then feast on it.

With the help of the force of the recoil, Alvin, who was very close to the big octopus, had already seen the terrifying beak-like mouthparts in its tentacles. He did not dare to hesitate anymore, swung his strong and powerful legs vigorously, and accelerated his body again.

Before the big octopus could react with its open tentacles, Alvin had already placed it on its forehead, looking at it closely with its two fist-sized yellow eyes.

The suckers on the arms and legs and the pigmented patches under the skin are clearly visible.

Grinning, the dagger in Alvin's hand was sent without hesitation between the eyes of the big octopus, where its nerve center is located.

嘤

Ignoring the giant octopus struggling behind him and waving its tentacles, Alvin rushed towards the water. If he had waited another half minute, he would have drowned at the bottom of the sea without the giant octopus eating him.

After rushing out of the water and climbing onto the raft, Alvin did not forget to carefully pack all his harvest, picked up the oar and rowed quickly towards the beach as if he was running away.
Chapter completed!