Bai Jiang and Lin Yuan were both stunned, and immediately turned their puzzled gazes to Chen Fan.

Chen Fan said amazingly, "Looking at the terrain structure here, there have existed for at least tens of thousands of years, and human beings tens of thousands of years ago did not have such advanced construction technology, let alone smelt metal, you see the iron pillars under the Spirit Bone Tower, which are clearly metals from another world, this is not a place that is simply used to worship holy relics, but more like a place to suppress something!" ”

Lin Yuan couldn't help frowning, "You don't want to say that this is made by aliens, I feel that your guess is ridiculous." ”

"It's not ridiculous!" Chen Fan said with a serious face, "Human beings are just a speck of dust in the sea compared to the entire universe, there are too many things in this world that human beings cannot predict, and even the universe we are in is just an inconspicuous gravel in many otherworldly universes, even other worlds may be generated, what is strange about aliens?" ”

Zhao Yu also nodded, and said, "I agree with Chen Fan's point of view, aren't those monsters from another world considered aliens?" It's just a general title. ”

"Okay, so what's next?" Lin Yuan nodded helplessly, and then said, "I didn't expect that there would be such a space underground, and after coming here, the concentration of Yuan Force we felt was more than ten times stronger than that of other places, it seems that this space is indeed related to another world, could it be that we have already come to another world?" ”

This is very possible, after all, Blue Star and the other world have been highly integrated, and the overlap of space has caused the two worlds to no longer have a clear boundary.

Chen Fan said, "Just guessing here won't make any difference, it's better to walk into the Spirit Bone Tower and take a look." ”

"Good!" Zhao Yu and Lin Yuan both nodded in agreement, and Bai Jiang looked like he wanted to say something, as if he wanted to express some different opinions, but he also knew in his heart that Chen Fan didn't have much of his own opinions, and he really didn't have the ability to stop Chen Fan from doing what he wanted, so he wisely chose to shut up.

Passing through the pile of rocks on the edge of the dark river, everyone quickly approached the Spirit Bone Tower, along the way, they found a lot of huge bone pits, under these pits there were thousands of bones, most of them were very different from human corpses, they were some strange beast corpses, Chen Fan even found a huge wolf tooth beast inside, the bare bone frame was four or five zhang high, it was hard to imagine what it was like when he was alive.

Zhao Yu's face became more and more uneasy, and when she walked through the pair of skeleton corpses, she gently pulled Chen Fan's arm and said cautiously, "Chen Fan, these things definitely can't be the original species of Blue Star, could it be that someone killed them here?" Who can kill so many monsters? ”

It's no wonder that Zhao Yu is so nervous, not to mention the monster corpses scattered everywhere, the skeleton they are walking through alone is terrifying enough, the rib remains of the monster far exceed the diameter of an adult's thigh, the hideous beast head is enough to fit into a container, although it has been dead for tens of millions of years, but the skeleton still exudes unimaginable terrifying ferocity.

According to Zhao Yu's estimation, the strength of this monster before his death would definitely not be lower than that of the Chiyan Python, at least it was also a monster with third-level mid-range combat power, not to mention the corpses scattered in other places, and even some guys with larger bodies and more fierce momentum.

Chen Fan is also walking on thin ice, and every step is quite difficult. Although these bones have been weathered for thousands of years, the ferocity exuded from the bones is still the same.

Of course, a dead monster, no matter how strong it was in life, was not enough to threaten the living, what really made Chen Fan feel cramped and uneasy was the spirit bone tower in front of him, why was this thing built here? The aura of Yuan Li in the pagoda is definitely not owned by Blue Star, could it be that tens of thousands of years ago, another world has already descended on Blue Star?

The more Chen Fan thought about it, the more puzzled he became, about half an hour later, everyone also passed through the area where bones were piled up everywhere, and continued to walk forward for a few hundred meters, and then they arrived at the magma section, where the Spirit Bone Tower was located on a boulder in the center of the magma, and the boulder was surrounded by magma, like an insurmountable moat, arching the Spirit Bone Tower.

"What to do, there's no way ahead!" Lin Yuan looked at the boiling magma flow under his feet, and a touch of helplessness flashed in his eyes. The pagoda building is still two to three hundred meters away from the place where they are located, and in the middle is a suspended magma crack, which is smoked at a high temperature of several thousand degrees, forming a large number of gully cracks on the surface of the rock crevice, and even the soil has turned black.

Lin Yuan cautiously walked to the edge of the crater, stomped lightly under his feet, and suddenly stomped out a few broken rock bricks, falling straight towards the magma flow like broken rain, and the large gravel at the mouth of the bowl fell into the magma mouth, and it didn't even make a wave, and it was quickly melted by the high temperature and turned into new magma.

Chen Fan also noticed that since the moment the Spirit Bone Tower was built, it seemed to be guarding against the approaching of living people, and at the moment, this magma crack was a natural barrier, and ordinary people would definitely not be able to pass unless they had wings.

However, this little test is naturally difficult for Chen Fan, although evolution did not bring him the ability to fly, but the existence of the third-level demon core gave him the ability to fly for a short time.

Chen Fan hesitated a little in his heart, and soon activated the third-level demon core, a faint gray mist roared out from his body, Chen Fan's toes slowly climbed, and he stood above everyone's heads in the air.

Zhao Yu frowned and said, "No, your flight distance is too short, and the temperature in this magma area is extremely high, what if you are exhausted halfway through the flight?" ”

Chen Fan said, "There is no better way, you can push me!" Zhao Yu still hesitated, gritted his teeth and said, "My wind net can push you fifty meters away at most, the farther the distance, the weaker the effect of the wind net, the span here is at least more than two hundred meters, are you sure you can do it?" ”

Chen Fan exhaled and said, "Just try it." ”

"You're just crazy!" Zhao Yu said that he refused, but in fact, he was already secretly accumulating strength, and a layer of cyan wind blade air flowed out from his fingertips, turning back and forth in his palm like a small hurricane.

Lin Yuan said worriedly, "I think it's better to forget it, it's too risky to do this...... You, what can I explain if I fall? ”

Lin Yuan's worries are also true, although Chen Fan can use the energy of the third-level demon core to fly into the air for a short time, but he can't cross such a long distance at once, once he stumbles and falls, he is 100% dead, not to mention that Chen Fan is not a real steel body, even if he is really an iron man forged from steel, he can't withstand the high temperature of nearly 10,000 degrees flowing down this magma.