In front of Catherine, there is a thirty-meter-wide underground river, the loud sound of water can indicate the degree of turbulence of the water, not far in front of the underground river channel there is just a corner, a large amount of river water hit the bank at the corner, splashing the sky, making the already humid environment even more humid, just standing on the bank of the river, after a while the clothes can be wrung out of the water. However, standing by the river, the originally stuffy environment is much more comfortable, and the water attribute element makes the temperature significantly lower, making the surrounding explorers a little unbearable to leave this riverbank.

"It's weird. Pannis walked to the shore, his eyebrows furrowed tightly, and he rubbed his chin and said suspiciously, "Did any of you hear the sound of the river when you were outside this cave just now? ”

"Huh?" Pannis mentioned, Catherine immediately reacted to what the discord she felt inexplicably just now, indeed as Pannis said, it was just a tunnel less than ten meters apart, but the sound of the water inside was completely inaudible outside, even in the tunnel, the wide dark river could already be seen, and the sound of the water flow could not be heard at all, only when she walked into this cave where the dark river was exposed, the sound of water suddenly appeared:" Don't you say I haven't noticed it yet, I haven't heard the sound of water before, Mr. Ike, has it always been so strange here?"

"Haha, it really scared you. The guide Ike held a thick beard, and his face was as dry as tree bark with a smug smile: "You guys, especially Pannis, no matter what strange things you see along the way, at most you can simply express your surprise, and there is no shock and confusion that should have occurred when you first arrived here, and now I finally got a chance, hahaha, that's right, it's always been like this here, and the inability of the sound of water to be transmitted to the outside is the biggest feature here." ”

"Is there any reason?" Lina played with her long silver hair on her sideburns, and her eyes were full of curiosity, "It's nothing special here, could it be because of these plants on the shore?"

Originally, except for Catherine, who was walking in front, the shoulder lights of the others were not turned on. One is to save the consumption of spars, of course, this is only Catherine's opinion, more because of the second reason. This is different from the weeping cave I have been to before, here until now, everyone has been moving in a relatively small tunnel, in this environment, only by the faint light overhead, you can already see all the positions around you, up and down, left and right, if you turn on the shoulder light, it will cause interference to the teammates walking in front, so Catherine, who opened the road in front, used the shoulder light to illuminate the road ahead, and the rest of the people followed.

Hearing Lina's words, several people turned on the shoulder lights at the same time and looked around. The location of the underground dark river is an oval-shaped cave, the dark river passes along the longest ends of the oval, this cave is more than forty meters high, has exceeded the height of some tunnels on the previous layer, but due to the location, it is not connected with the previous layer. On both sides of the dark river, there are many trees that reach the top of the cave, and the leaves of these trees cannot tell what color they should be, but under the illumination of the light, they look grayish white and dark purple respectively, and the leaves are obviously full of a lot of metal, each leaf is brittle and hard, and even makes a tinkling sound when it falls to the ground.

Catherine spread her vindictive shield, tentatively walked over to a tree, and tapped her fingers on the trunk, which, as she expected, was as full of metal as the leaves, and struck it as if it were a sword. Such trees, if it weren't for the presence of fallen leaves on the ground, I'm afraid no one would think that they were still alive plants. Catherine pulled out her one-handed sword, infused her fighting energy and lightly slashed at the trunk, and the place of contact made a crisp impact of gold and iron, leaving only a shallow sword mark on the trunk.

"Vivien. Catherine picked up a few leaves of different colors and handed them to the mage girl: "Burn them." ”

Vivien pinched and picked up a leaf with two fingers, and with a flip of her wrist, the flames were already burning on the blades of her fingertips, the fire was far more fierce than she imagined, and the leaves were more resistant to burning than she imagined, and it took two minutes for the palm-sized blades to completely burn out. Vivien raised her hand as if she was holding something, shook her head, and said, "It seems that your plan has failed, eldest sister." A material of this hardness cannot be processed into armor, nor can it be heated and forged. And you see, the dregs of these things on my hands that have come down after they have burned out. ”

Catherine leaned in and looked at Vivien's gloves with a dark residue that felt like scraps of metal. She pinched one and looked at the light for a long time: "This looks like metal?"

"It's copper, pure copper. Vivien said, "I've never heard of plants and metals that can grow together, but these trees are really like this, there should be a vein of copper deep underneath them, and I don't know how to absorb a lot of copper into the body, so it became like this." ”

"Don't think about it, this can't be used, we've tried it before. Ike persuaded: "More than seventy years ago, someone once took out a few branches and gave them to the goblins for study, and the goblins hired many scholars from the Mage Guild to work together for five years, and finally came to the conclusion that they have no other value except that they are more resistant to burning when dry firewood. ”

"It's a shame that I thought I could sell it as armor. Catherine reluctantly threw away the leaves, but she was not particularly disappointed, after all, she didn't have much expectations: "Although these plants look very strange, it stands to reason that they should not be unable to transmit sound." ”

"If it stands to reason, it shouldn't be possible to grow trees like this here, because there's no sunlight here. "Pannis suddenly drew his sword, and the people around him could feel the strange energy representing the power of the realm blessing on his body, allowing him to raise his strength to the top, and then slashed at a tree with a sword, cutting it in two from his waist:" If I don't have to guess, I'd guess that they live by absorbing huge sound waves, and that the sound here doesn't usually come out because they absorb all the sound waves, and they must have a unique way of forming a barrier at the entrance of the cave, so that the sound waves that should have passed through the hole are reflected back into the hole for them to absorb. ”

"What do you chop it for. Catherine frowned and watched the one-meter-thick tree fall down with a loud noise, and waited until the roar was over before she said: "It is true that the noise lasts less than in a normal cave, but when I called you to come over just now, didn't you hear it too? No, I remembered, I shouted at the entrance of the cave, and I didn't come in." ”

"Anyway, it's a no-responsibility guess, just guess, as for whether this is the case, I'm afraid no one will know in a few hundred years. Pannis measured the broken trunk, and slashed it with another swing of his sword, the demigod's attack power was indeed strong, and it seemed that a random sword cut off a piece of log more than thirty centimeters from the trunk. Lifting the log in his left hand and checking it in his hand, Pannis nodded: "Sure enough, it's similar to what I guessed, the weight of this tree is actually very light, lighter than solid wood of the same volume, it's really interesting, obviously it contains a lot of metal, but it turns out to be smaller than wood." ”

"You want to make something out of it?" Lina looked at Pannis's movements curiously: "But the hardness is so high, whether it is chopping or cutting, it is difficult to process effectively, what can it be made?"

"Isn't there polishing in addition to chopping or cutting?" Pannis smiled mysteriously, tied the stake with a rope and carried it on his back: "As for what I'm going to do, keep it a secret first, hehe, you'll know when I make it." ”

Lina glared at him angrily, walked to the riverbank, and moved the pillar of light from the shoulder lamp to look into the river. The whole river is wide and turbulent, but the water is so clear that you can almost see the smooth gravel at the bottom of the river through the high-speed flowing water. Between the rubble, there are occasional year-round aquatic creatures swimming around the subterranean area, and while not as exaggerated in size as on land, they are much larger than their distant relatives on the continent of Yara. Lina waved her hand, and a toxin detection magic technique was put down on the river to confirm that there were no toxic ingredients in the water, so she squatted down on the bank, put her hand into the river water and tried it, frowning: "Why is the temperature so high, it's almost time to catch up with the hot springs that I soaked in Senaya." ”

"Maybe there's a fire-attribute leyline energy convergence point on the way you pass by, or you pass by the edge of the magma pool. Catherine said, "But I suggest you get off the shore first." ”

"What, have you found the beast?" Lina stood up and shook off the droplets of water from her hands.

"Not yet. Catherine shook her head and said, "However, there is a high probability that there will be lurking demonic beasts in the waters of unknown circumstances, have you forgotten what happened when we ventured outside the borders of the Bailong Dominion in Neville? And the current here is so fast, it is estimated that you will be washed away soon after you go down, and it will be too late to save you. ”

"Sister, don't worry, I can't forget that lesson. Although Lina said words of relief in her mouth, she still obediently took a few steps back and left the riverbank: "You see, such clear water, if there is a demonic beast lurking in the water, it is impossible for us not to see it, and we are not blind." ”

Just as Lina had barely finished speaking, just as she had just retreated from the riverbank, the water suddenly exploded, and a vague shadow, with splashes and violent water sounds, leaped out from the bottom of the river. (To be continued.) )