<h4>Chapter 724 Lost Civilization</h4>


    "The divine lightning should be in the pit ahead." Xiang Nan pointed with his hand.


    He discovered that even ughter luck ''s movements had slowed down under such low temperatures.


    ughter luck ''s ck hair was wrapped in ayer of dark blue frost. With a shake, arge amount of blue frost fell down.


    Xiang Nan impatiently ran to the edge of the pit and looked inside. He was shocked to find that the pit was endless, but in the dense fog, he had actually found some shadowy outlines of the pce with his lightning vision.


    "Has anyone ever built a pce in such a damn ce?" Xiang Nan rubbed his chin in shock.


    It was also strange that this heavenly pit seemed to be a dark blueke.


    The entire pit was filled with a dark blue liquid.


    Xiang Nan fished out the liquid, but he discovered that it was not water, and no water could still take on a liquid state at this temperature.


    Xiang Nan put the dark blue liquid in his hand in front of his nose and sniffed. He frowned and used Yuan Qi to heat the liquid. He discovered that the liquid would disappear once it warmed up.


    "Air?" Xiang Nan suddenly understood.


    "What?" ughter luck also came over curiously to take a look. He could not understand the reasoning behind it.


    Xiang Nan pointed at the crater and said, "There is something inside that can release extremely terrifying cold temperatures."


    "When that level of low temperature urs, even air cannot escape. It will be liquefied at low temperatures, resulting inrge areas of vacuum."


    "Once the vacuum zone is formed, more air will be sucked in by the vacuum. The newly filled air will also be unable to escape. It will also be liquefied, forming a vacuum zone and then pumping air from outside."


    "So many times, the massive amount of air was sucked into the heavenly pit, forming the peculiar scenery of today."


    ughter luck still didn''t understand, and his eyes were filled with confusion.


    Xiang Nan said, "In other words, we can breathe in the dark blue liquid. Let''s go, just follow me."


    The two of them entered the sky of the Blue Lake. As Xiang Nan had said, they could breathe directly in this liquid.


    It was just that he wasn''t used to it at first. Breathing in this kind of ce was like breathing in water. He felt drowning. However, once he adapted, it wouldn''t matter anymore.


    The temperature was still decreasing, and as Xiang Nanyue got closer to the core of the crater, the temperature became lower.


    When he was only ten kilometers away from the pce, even ughter luck could no longer withstand the cold. That kind of temperature caused ughter luck to bepletely frozen and turned into an ice sculpture.


    Xiang Nan could only use his Yuan Qi to unfreeze the ughter, but considering that if he left the ughter here, the result of the ughter would probably not be too good.


    "Stand closer to me. I''ll use my Yuan Qi to protect you." Xiang Nan spread his Yuan Qi out and wrapped himself up with ughter luck .


    When the two of them were still eight miles away from the pce, the temperature continued to drop. Xiang Nan felt that his Yuan Qi was no longer running smoothly.


    "Guide the light!" Xiang Nan raised his right hand, and in the boundless sea of mist and blue liquid, a gentle beam of sunlight shone down, enveloping the two of them.


    ughter luck ''s eyes widened in surprise. He simply couldn''t believe the "miracle" he saw.


    "This is my Sun God Technique. Luminescence can bring us considerable temperatures. Let''s continue." Xiang Nan exined as he walked.


    When the two of them were still five miles away from the pce, there was no way to get close.


    The temperature here was even lower, causing the blue air liquid to crystallize in arge area, turning into a giant block of ice made of frozen air.


    The entire pce was sealed inside by the ice.


    "We have to break through the ice and move forward."


    Xiang Nan used his Yuan Qi to condense a ten-meter-diameter lightning fireball, allowing the fireball to move forward while ughter luck and himself followed behind.


    Once the fireball touched the huge dark blue crystal, it vaporized it to form a passage. Xiang Nan and the other two had just entered when the passage behind them was immediately frozen.


    The further he went, the harder it became to dissolve. By the time Xiang Nan was about a mile away from the pce, the ice crystals here were already as hard as beginner Earth Soldiers!


    It took less than ten minutes for Xiang Nan to break through the four-mile-long ice crystal, but it took him more than half an hour to break through thest mile of ice crystal!


    When they finally arrived at the entrance of the pce, Xiang Nan let out a long sigh of relief. The amount of Yuan Qi in his body was several times more than that of an ordinary martial artist, but now, there was not much Yuan Qi left in his body.


    "What a peculiar ce." Xiang Nan stared at the entrance to the pce in surprise.


    There were two ice crystal doors in the pce that were closed. On the two ice doors, there were arge number of relief pictures and characters.


    Xiang Nan did not recognize these words.


    Hundreds of thousands of years ago, when humans had teleportation arrays and flying ships, the travel between the five major worlds became more frequent.


    Since then, civilizations from all over the world have shed and brought the world together.


    Although mankind does not have a specific form of amon currency, but the unified provisions of gold, silver and copper as the raw materials for coining money.


    In order to allow trade between the various regions of the world, in just a few hundred years, allnguages and characters had been unified.


    "This must have been left behind by an extinct race." Xiang Nan nodded thoughtfully.


    Those words he didn''t recognize could only mean that they originated from a rare race, and that race hadn''t been passed down yet.


    Although the words are unrecognizable, the pictures aremon.


    On the relief, Xiang Nan saw arge number of humans gathered in circles, worshipping towards a thunderball.


    Because the reliefs weren''t painted, Xiang Nan could only tell that it was a lightning ball. However, it was impossible to determine the exact shape and color of the lightning ball.


    He was very excited. He knew that an unknown and mysterious civilization was about to appear in front of him.


    "Are you ready? We''re going in." Xiang Nan seemed to be discussing with ughter luck , but in reality, he couldn''t wait to push open the two ice crystal doors.


    Following the rumbling sound of the giant door opening, a burst of warm wind suddenly blew out from the interior of the pce.


    "Huh?" Xiang Nan was slightly delighted. He immediately rushed in with ughter luck and quickly closed the door.


    The temperature inside the pce was rtively normal. Although it was still extremely cold,pared to outside, it made Xiang Nan feel much morefortable. At least here, he wouldn''t be frozen into an ice sculpture without using his Yuan Qi.


    The interior of the pce was beautifully decorated. There wererge patches of beast hides that wereid on the ground like carpets. These hides were still bright and well preserved at low temperatures.


    Golden pce pirs stood tall in every corner. Each pir had arge number of relief murals. The scenes depicted on them were very simr. Basically, they were all rted to a wonderful thunderball.


    "I really found the right ce." Xiang Nan clenched his fists and said, "It took me so much time to find it."