Facing the problem of the grey dolphin, Renault just smiles:

    "we have our own information channels. The invasion of the demon army ten thousand years ago is no secret to us As a matter of fact, we also know that when the netherworld retreats from this world, it leaves a trans boundary transport device in the Western Hemisphere, that is, the "netherworld gate", which is submerged in the lava under the misty sea, right

    "In addition, the grey porpoises are aquatic creatures, and the environment of the misty sea is not very friendly to you. If I guess correctly, the reason why you choose to live here is to guard it?"

    Probably due to Renault''s words of "peaceful coexistence", this time gugula was very straightforward:

    "you''re right!"

    Then it tells the related historical Secrets:

    "the great shepherd told me that in the lava sea below the misty sea, in addition to the" gate of void ", there is also a" star ring tower ", which is used to extract the fire elements from the earth vein, transport them to the" gate of void ", and then to the world of void demons."

    "It is said that the" star ring tower "is hundreds of meters high. It can form a huge energy network through the" devil''s pillar "buried in other places to collect heat from the earth veins on a large scale..."

    After hearing the words "devil''s pillar", Renault was shocked.

    At this moment, his mind immediately thought of a prehistoric relic that he dug up in the depth of an extinct volcano in midway a few years ago. It was a crystal cylinder with a devil''s head carved on the surface. (for related introduction, see a later accident in the Institute of rune, in which the netherworld demons introduced the dissimilated energy in the "coordinate object" into the relic, and demonized two magicians who happened to be close to the prehistoric relic.

    This fully shows that prehistoric relics have the function of "sub space transmission". According to gugula, the "devil''s pillar" probably has the same function besides absorbing energy.

    Is that relic The devil''s pillar?

    Reynolds as like as two peas of ice crystals, which grow rapidly in the air, and become a cold ice cylinder. The surface of the ice sheet is raised with several strange devil designs, which are exactly the same as those of prehistoric relics.

    This scene immediately attracted Golmud''s attention.

    Renault pointed to the ice column and asked eagerly:

    "miss gugula, is this what you call" the devil''s pillar "

    Miss Grey porpoise looked at the column carefully. Her eyes lingered for a moment on the ferocious and terrifying head of the devil, and she couldn''t help looking surprised:

    "God, I can''t believe that there are two" devil''s columns "sealed up in our family, which are exactly the same as this column Under Renault''s crown, have you ever got a "devil''s pillar"? Where did you get it? "

    "That''s right!"

    Renault nodded slightly and described the experience of digging "devil''s pillar" roughly.

    This kind of strange thing surprised the foreign lady:

    "you are so lucky to be crowned!"

    Renault smiles a little and says:

    "no wonder there is no record of volcanic eruption in the historical books of the human world. It turns out that the ghost is caused by the void demons Ten thousand years ago, when the demons invaded, they must have planted a lot of "devil''s pillars" all over the world, and extracted part of the energy from the veins, which led to the great weakening of the underground lava movement. " (there are no volcanoes in the other world, as mentioned in Chapter 217)

    "well, from this point of view, maybe I should send a large number of people to excavate the" devil''s pillars "on a large scale in various places where there are suspected signs of volcanic eruption, so as to avoid using these" devil''s pillars "when the demon army comes in the future..."

    Miss gurula convincingly replied:

    "under the crown, what you said must be the truth I think it''s a very necessary job to excavate the "devil''s pillar."

    In addition, from Miss Grey porpoise''s words, Renault realized that the technology contained in the "devil''s pillar" is quite remarkable. As long as it is thoroughly studied, it will greatly promote the research progress of the "heat death plan".

    In particular, the energy collection and transmission system is the slowest of the four systems in the whole research project.

    Although Haichao led by the prehistoric magic civilization left behind the "anti God gun", but the fragmentation of the magic source core caused the drastic change of the sea of magic power, in which many technical details, it is very difficult to crack and restore.

    Comparatively speaking, the technology of netherworld is more adaptable and more helpful to the "heat death plan".

    Renault turned his head and gazed at the icicle, feeling more and more the wonder of fate in his heart.

    It turned out that the mysterious power had already sent some key items to him.

    Looking at the strange look on Renault''s face suspiciously, miss gugula said:

    "in the war ten thousand years ago, the floating magic fleet of the black crown Empire, together with us grey porpoises, fought to death to attack the" gate of void "and" star ring tower ". Finally, it successfully created a huge earthquake, which split the earth and let the two buildings sink into the underground lava 。”"The great shepherd told me that it was in that war that we got two pillars of the devil

    Renault touched his chin and continued to listen.

    "Later, the human magician''s army was defeated in successive battles, and the situation became worse and worse. The Supreme Council of the black crown empire was determined to detonate the" magic source core "and expel the damned demons by destroying the whole world."

    "According to the records of Shuiwen crystal shells preserved in the clan, it is said that on the day when the" magic source core "was detonated, pieces of demon warships completely lost control and fell from the high sky. There were also countless demons who had serious magic backfire, and their whole body lit a fierce fire of magic until they were burned to ashes. The more powerful the demon clan, the more serious the backfire, The faster you die. "

    "However, the black crown empire was also very heavy. Almost all the magicians above the middle level had a terrible rampage of magic in their bodies and died in this huge disaster And we, the grey dolphin, are no exception. Most of the sea herders are torn to pieces by the magic of water

    At this point, Miss Grey dolphin''s sharp voice, with a trace of sadness, seemed to feel sorry for the tragic experience of her ancestors.

    "In addition, the loss of control of the" magic source core "also set off a super flood that swept across the world. Most of the land was submerged by the torrential floods. It took a few months for the floods to completely subside, and the land came out of the sea again During this period, countless land creatures died, and none of them survived. "

    "After the great flood, we grey porpoises completely lost contact with the black crown Empire, and no one came to look for us. We once thought that human beings might be extinct by the flood Until more than 3000 years ago, our people met a wrecked human sailing boat on the edge of the misty sea. We tried to help the human crew, but unfortunately, the crew took us as monsters and attacked us.... "

    Hearing this, Renault could not help sighing:

    "after the destruction of the world, the black crown Empire has perished, and the only few survivors are almost ordinary people. It is estimated that few people know the existence of the grey dolphin tribe."

    Googolla wiggled his tail fin and said:

    "that''s our guess, so the great herdsmen gave up the idea of contacting humans For thousands of years after the great flood, we, the grey dolphin people, have been living here to study the methods of restraining the "gate of void" and the "Tower of star ring."

    "Because we know that the netherworld yearns for the energy in the earth, just like the gray shark yearns for flesh and blood. One day in the future, the netherworld will invade again."

    "Oh? Research? "

    This sentence immediately aroused Renault''s interest, he asked with great interest:

    "after so many years of research, what good things have you got?"