"Shenlei should be in the pit ahead." Xiang Nan pointed with his finger.
He found that even Tu Yun's movements became sluggish under this low temperature.
Tu Yun's black hair was covered with a layer of dark blue frost, and when he shook it, large pieces of blue frost fell off.
Xiang Nan couldn't wait to run to the edge of the tiankeng, looked inside, and was shocked to find that the tiankeng was huge and boundless, but in the thick fog, he found some faint outlines of the palace with his thunder and light eyes.
"Someone ever built a palace in such a ghostly place?" Xiang Nan rubbed his chin, feeling extremely surprised.
Equally strange, this tiankeng seems to be a deep blue lake.
The entire tiankeng was filled with a dark blue liquid.
Xiang Nan scooped up the liquid, but found that it was not water, and no water could still be liquid at this temperature.
Xiang Nan put the dark blue liquid in his hand in front of his nose and sniffed it. He frowned and heated the liquid with his vitality, only to find that once the liquid heated up, it would disappear.
"It's air?" Xiang Nan suddenly realized.
"What?" Tu Yun came over to look curiously, he couldn't understand the reason.
Xiang Nan pointed to the tiankeng and said, "There's something inside that can release a terrifyingly low temperature."
"When that level of low temperature appears, even the air cannot escape, and it will be liquefied by the low temperature, thus creating a large area of vacuum."
"When the vacuum zone is formed, more air from the outside will be sucked in by the vacuum, and the newly filled air will also be unable to escape, and will also be liquefied to form a vacuum zone, and then the air will be drawn from the outside."
"Repeatedly, a large amount of air was sucked into the tiankeng, forming the current strange landscape."
That Tu Yun still didn't understand, his eyes were full of bewilderment.
Xiang Nandao: "In other words, we can breathe in these dark blue liquids, let's go, just follow me at ease."
The two of them entered the sky of the "Blue Lake". As Xiang Nan said, they could breathe directly in this liquid.
It’s just that I didn’t get used to it at the beginning. Breathing in this kind of place is like breathing in water. It feels like drowning, but once you get used to it, it’s fine.
The temperature is still dropping, and as Xiangnan gets closer to the core area of the tiankeng, the temperature gets lower.
When he was only more than ten miles away from the shadowy palace, even Tu Yun couldn't bear it anymore. The low temperature made Tu Yun completely frozen and turned into an ice sculpture.
Xiang Nan could only use his vitality to defrost the slaughter, but considering that if the slaughter was left here, the result of the slaughter might not be very good.
"Stay closer to me, I will protect you with my vitality." Xiang Nan diffused his vitality out of his body, wrapping himself and Tu Yun.
When the two of them were still eight miles away from the palace, the temperature continued to drop, and Xiang Nan felt that his vitality was not running smoothly.
"Lighting!" Xiang Nan raised his right hand high, and in the vast sea of fog and blue liquid, a beam of gentle sunlight shone down, enveloping the two of them.
Tu Yun's eyes widened in surprise, and he couldn't believe the "miracle" he saw.
"This is my sun magic skill, the light can bring us a considerable temperature, let's keep going." Xiang Nan explained while walking.
When the two of them were still five miles away from the palace, there was no way to get close.
The temperature here is even lower, causing the blue air liquid to crystallize on a large scale, turning into a giant ice cube frozen by air.
The entire palace was sealed inside by that ice cube.
"We must break through the ice."
Xiang Nan condensed a ten-meter-diameter lightning fireball with his vitality, let the fireball walk in front, and himself and Tu Yun followed behind.
Once the fireball touches the huge dark blue crystal, it will vaporize the crystal and create a passage. Xiang Nan and the two just entered, and the passage behind them was immediately frozen.
The further you go, the more difficult it is for the ice crystals to dissolve. When Xiang Nan is still about a mile away from the palace, the ice crystals here are as hard as a low-level ground soldier!
It took Xiang Nan less than ten minutes to break through the ice crystals of the previous four miles, but it took him more than half an hour for the last mile of ice crystals!
When they finally arrived at the gate of the palace, Xiang Nan breathed a long sigh of relief. The vitality content in his body was several times higher than that of ordinary warriors, but now, his vitality was running out.
"It's really a strange place." Xiang Nan stared at the entrance of the palace gate in surprise.
There are two ice crystal stone doors closed in this palace, and there are a lot of relief pictures and words on the two ice doors.
Xiang Nan didn't know these words.
As early as hundreds of thousands of years ago, when humans possessed teleportation arrays and flying ships, the traffic between the five major world regions in the southeast, northwest, and middle regions became frequent.
Since then, civilizations from all over the world have intersected and collided, making the world unified.
Although human beings do not have a specific style of unified currency, they have uniformly stipulated that gold, silver and copper should be used as raw materials for minting currency.
In order to enable trade between various world regions, after a few hundred years, all languages and characters were unified.
"It must have been left by an extinct nation." Xiang Nan nodded thoughtfully.
I don't know those characters, it can only show that the characters come from a rare ethnic group, and that ethnic group has not yet passed it down.
Although the text is unreadable, the pictures are common.
Xiang Nan saw in the relief picture that a large number of human beings formed a circle and worshiped a thunderball.
Because the relief was not colored, Xiang Nan could only recognize that it was a thunderball, but it was impossible to verify the exact shape and color.
He felt very excited in his heart. He knew that there was an unknown and mysterious civilization that was about to be revealed in front of him.
"Are you ready? We're going in." Xiang Nan seemed to be discussing with Tu Yun, but in fact he couldn't wait to push the two ice crystal doors open.
Following the sound of the rumbling giant door opening, a gust of warm wind suddenly blew out from the inside of the palace.
"Huh?" Xiang Nan was slightly delighted, and he immediately rushed in with Tu Yun, and quickly closed the door.
The temperature inside the palace was relatively normal. Although it was still terribly cold, it made Xiang Nan feel much more comfortable compared to the outside. At least here, he would not be frozen into an ice sculpture without using his vitality.
The interior of the entire palace is very ornately decorated. There are large pieces of animal skins, which are spread on the ground like a carpet. These furs are still very bright, and they are preserved at low temperature.
Palace pillars made of gold stand in every corner, and there are a large number of relief murals on each pillar. The scenes described on them are very similar, basically related to a wonderful thunderball.
"I really found the right place." Xiang Nan clenched his fists: "After spending so much time, I still found it."