Everyone was stunned when they saw the black stone in Sha Xiaoliang's hand, and after a while, Cang Lan finally reacted, and quickly jumped off the Ice Spirit Tiger and walked in front of Sha Xiaoliang, and took the black stone in her hand.

"Why didn't you say it earlier?" Cang Lan took the black stone from Sha Xiao's hand, and couldn't help frowning and looked at Sha Xiaoling, "Before leaving, I clearly said that if you find Heishi, you must notify me and Hong Jiu'er as soon as possible, why did you go just now?"

Seeing that Cang Lan's face was cold again, Sha Xiaoliang didn't dare to be arrogant anymore, so she had to sobbed and continued: "I...... Ever since I got this black stone out of the glacial lake, I felt like something was watching me, and I felt like it had been following me ever since I came out of the cave, and I forgot about the message to inform you out of fear......

After Sha Xiaoliang finished speaking, she lowered her head, not daring to say anything more, Cang Lan first stared at her with questioning eyes for a while, and then carefully put the black stone she had taken from her hand in front of her and studied it, but in the end she found nothing.

Just when Cang Lan was holding the black stone in his hand, he received a spiritual letter from Hong Jiu'er, although it was only a few simple words, it made everyone feel uplifted.

"Snow Wolf found the Black Stone in the Trial Ice Cave, come quickly. ”

After a moment of silence, Cang Lan still put away the black stone that Sha Xiaoliang found, and said to everyone: "Although I don't know the authenticity of these two black stones, since I found them, I still have to retrieve them first, and then do other investigations, you can go to the trial ice cave with me now." ”

After Cang Lan finished speaking, he immediately jumped on the Ice Spirit Tiger, and the rest of the people also rode their own mounts and followed the Ice Spirit Tiger all the way, in order to save time along the way, the Ice Spirit Tiger ran while also letting out a threatening tiger roar, and the fierce beasts retreated everywhere they passed, and this road was naturally unimpeded.

When the group set off from the meeting place, it was already close to sunset, and after arriving at the trial ice cave, it was already the middle of the night, Cang Lan put away the ice spirit tiger at the entrance of the trial ice cave, took out his white jade staff, lit a cluster of soft warm light at the tip, and led the rest of the people into the trial ice cave, and told them to follow themselves closely and not to get separated.

The few people who entered the trial ice cave for the first time were a little dizzy by the scene in the ice cave, although the light on the tip of Canglan's staff was very soft, but after being infinitely refracted by the mirror-like four walls, it became very dazzling, Canglan had to open his mouth to remind them not to focus on the bright place, otherwise it would be easy to burn their eyes, and turn back every time they turned to see if anyone was left behind.

The branches in the ice cave branched in all directions, but Canglan quickly found the location of Hong Jiu'er with her keen sense of smell, and after entering the ice lake cave where she was, the group was startled by the situation in the ice lake under their feet.

I saw that under a glacial lake the size of the entire Dragon City, an irregular black stone with a length of thirty or forty zhang and a width clearly appeared under the transparent ice, seeing that this black stone could indeed be called a huge black stone, Cang Lan first frowned and pondered for a while, and then turned his gaze to Hong Jiu'er, who was sitting in the snow wolf pile to keep warm.

"Aren't you searching the two caverns to the north? How did you find the Ice Cave of Trials?"

"These snow wolves brought me in. Hong Jiu'er reached out and touched the snow wolves gathered beside her, and continued: "After I came out of the two caves in the north, these snow wolves seemed to smell something and brought me all the way. But as soon as I came here, I found that this seemed to be the cave that Chi Muyan had brought us to, and it was here that he subdued his snow unicorn......"

"What? Snow Kirin? Is there still ...... Hmm......" As soon as Hong Jiu'er's words were halfway through, Lin Mumu shouted excitedly, but he was immediately covered by Guihai Luoxue beside him.

"It's okay, Sister Jiu'er, you continue, don't pay attention to her, she was so excited when she heard the summoning beast. ”

Hong Jiu'er glanced at Lin Mumu, who was dragged aside by the falling snow from Guihai, and continued what she said just now, "So I started to think that these snow wolves smelled me, so they brought me here again, until I saw that really huge black stone." ”

When Hong Jiu'er said this, he also walked to the ice where the black stone was reflected, and knocked the ice twice with his weapon, "Is this really the black stone? The ice here doesn't seem to be so thick, so it won't cause such a big visual error, right?"

Cang Lan also looked at the soles of her feet and frowned and shook her head, "Just now, Sha Xiaoliang has already found a black stone in those two caves in the south, so I don't know if this is a real black stone, but I think the black stone just now seems to be a little ...... Strange. ”

As Cang Lan spoke, she deliberately glanced at Sha Xiaoliang from the corner of her eye, but found that she had turned around without knowing whether she was intentional or unintentional, and was staring at the black stone under the ice with the others.

"What??" Hong Jiu'er's eyes widened in surprise after listening to Cang Lan's words, "What about this ......?"

"Wait. As soon as Hong Jiu'er said this, she heard Chi Mudie, who had tapped the ice a few times after her, and suddenly said to them seriously: "You guys exit this ice first, I think the tapping sound of this ice layer sounds a little strange." ”

Although everyone didn't understand what Chi Mudie said strangely, they still withdrew from the ice according to what she said, and after the entire ice surface quieted down, Chi Mudie gently tapped several different positions on the ice with the horizontal plane of her short blade, listening carefully to the echo coming from under the ice.

But after knocking for a while, Chi Mudie's expression became even more puzzled, and after knocking the selected positions again, he frowned and said to everyone: "It's likely that there is really another black stone down here, and it's really only the size of a fist, but this ice surface is really weird." ”

The rest of the people didn't understand what Chi Mudie meant, only Cang Lan also frowned and said, "Indeed, if it's just a simple phenomenon of lake freezing, how can the ice in this area where the black stone is located be frozen so thickly?"

Chi Mudie shook her head at Cang Lan with a serious face and said: "No, what I said is strange is not only the shape of this ice, but also the unbelievable thing is that I actually heard that this ice surface is empty, and there is a faint sound of waves crashing on the reef, judging by the distance of the sound, I am afraid that it is the sea of death under the seven floating islands." ”

Listening to Chi Mudie's words, everyone's faces showed a look of astonishment, only Sha Xiaoliang didn't understand Chi Mudie's meaning at all, and asked impatiently: "Chi Mudie, what are you talking about here? What is empty? How can you go to the sea of death again? What are you talking about? ”

"You're uneducated, don't drag us all in! Fluttershy understands what she means. As soon as Sand Xiao's words fell, Guihai Luoxue glanced at her with disdain, and used his staff to draw an inverted cone in front of her, and drew a circle at the bottom to represent the black stone, and impatiently explained to Sand Xiaoling, "Fluttershy is saying that the current ice surface is in this shape, and the black stone is at the tip, and then the bottom is empty......"

"Hmm...... This is indeed very strange, since it is empty underneath, how did this ice surface freeze like this?" Guihai Luoxue compared to Sha Xiaoliang here, and couldn't help frowning and muttering to himself, while Hong Jiu'er on the side also looked at the sketch she drew on the ground and wondered.

"That's not right!" After a moment of silence, Hong Jiu'er suddenly raised his head and said in surprise: "The last time Chi Muyan was here to subdue the snow qilin, the surface of this lake did not freeze, not only did it not freeze, but the temperature of the lake water was still warm and hot, and we were still sitting and resting and soaking our feet. ”

After listening to Hong Jiu'er's words, Cang Lan also recalled: "Yes, speaking of which, when I first entered this trial ice cave, I also smelled a warm breath near here, but the breath at that time was mixed with the smell of a fierce beast, so I intuitively avoided this place. In other words, the glacial lake has only begun to freeze since then, and it has since encountered some major influences to form its current bizarre shape. ”

After Cang Lan finished speaking, she turned her gaze to Chi Mudie, who had been frowning and silent, and suddenly opened her mouth in surprise, confirming to Chi Mudie, "Fluttershy, you mean, we can't destroy the ice surface rashly now?"

Chi Mudie nodded slightly, walked a few steps towards the center of the ice, squatted down again and knocked on the ice, before slowly asking, "Canglan, have you noticed it too?"

The rest of the people didn't seem to fully understand what these two people meant, Hong Jiu'er also followed Chi Mudie and walked a few steps towards the ice, knocked on the ice like her, listened to the echo, and finally asked puzzledly: "What have you two noticed again?" Why can't we destroy the ice and take the black stone now?"

"The black stone is to be taken, but it must not destroy the entire ice surface. Cang Lan said, and walked with Chi Mudie to the position where the black stone was reflected, standing there frowning and pondering, the astute Lin Mumu looked at the sketch drawn by Guihai Luoxue at his feet, and was the first to understand what Cang Lan and Chi Mudie meant.

"I know!" Lin Mumu shouted excitedly, and explained to everyone through the sketch on the ground, "You see, since this ice surface is inverted cone, then it must be thick in the middle and thin on all sides, if we forcibly destroy it from above now, it is likely to make it completely shatter and break in the thinnest place, and Fluttershy said that the ice surface is suspended in the air, and once the ice surface that supports it around it breaks apart, the thickest ice in the middle will also fall along with the black stone." ”

"Lin Mumu, you can! It seems that you didn't follow Brother Muyan for nothing that year, and you really learned a lot of things!" After listening to Lin Mumu's analysis, Guihai Luoxue couldn't help but praise her, but quickly continued in the next moment: "It would be better if you stopped using those strange-shaped summoned beasts to refresh our bottom line." ”

After listening to Lin Mumu's analysis, Hong Jiu'er also took a few steps towards the center of the ice lake, looked down at the black stone under his feet, and asked, "Then how are we going to take out this black stone?"

Chi Mudie looked at the ice under her feet and sighed helplessly, "You can only slowly melt from the thickest part of this ice to the top of the black stone, but you can't let the temperature in this cave rise, otherwise the ice will start to melt from a relatively thin place, and this black stone will still fall, and according to the thickness of this ice surface, even if the seven of us take turns to melt the ice without stopping, it may take several days." ”

"Okay, since you're going to use fire-based spells, I'll be the first to do it. Sand Xiaoliang finally understood a project she was good at, so she was the first to volunteer to walk to the top of the black stone, Chi Mudie saw her expression excited, so she quickly drew a general range for her on the ice, and reminded her with some worry: "Sha Xiaoya, please be smaller." ”

But when the sand boy began to melt the ice, she found that it was far more difficult than she imagined, the ice water that had just melted in the heat was refrozen again before it had time to evaporate, and after this situation was repeated many times, the patience of the sand girl finally reached the limit, she threw away her staff, took out the chisel that usually excavated precious gems from her spirit wrap, and began to dig the ice surface hard, although the effect was much better than before, but it caused the entire ice surface to vibrate, and was finally dragged away by the expected Guihai Luoxue and Lin Mumu......

In this way, it took ten full days for the seven people to melt the ice in turn, and after the hole they melted finally reached the vicinity of the black stone, Chi Mudie first asked all of them to exit the ice, and carefully entered it himself, taking out the black stone at the bottom.

However, when Chi Mudie's hand holding the black stone just stretched out of the ice, the black stone in her hand suddenly began to emit a thick demonic aura, and several people standing outside the ice were shocked at the same time, Cang Lan rushed over at the first time, and urgently shouted to Chi Mudie, "Fluttershy, quickly throw that stone away!"