♂?，，

  Just as Lin Fei was about to give up hope, the underground crystal mine suddenly started exploding with a loud "boom boom boom". The metal supports and rocks that were holding up the mine began to fall one after another. The mutated sand dragon that was roaming around was also knocked over by the sudden explosion and was hit by the falling rocks and metal rods.

  Originally, Crystal Stones were resistant to high temperatures, but the internal storage of a large amount of energy made them unstable. They couldnt withstand the continuous high-temperature flames sprayed by Salamander, and eventually reached the zero-burst point of the crystal stone, causing underground crystal mines to start exploding one after another.

  This is also why after hearing that a fire-breathing dragon had appeared in the underground mining cave, not one of the armed prison guards dared to come down.

  Lin Fei, who had never come into contact with crystal ore before, did not know the terror of crystal mining encountering high-temperature flames.

  So there was no hesitation in going down to the Crystal Mine without any protective gear.

  Explosions kept erupting, and Mutant Salamander no longer had any intention of continuing to hunt down the surviving prisoners.

  Its massive body, after being hit by the crystal mine explosion several times, its hard scales could not withstand the impact of continuous large-scale crystal explosions. The original 50-60 meter long body of the dragon was actually blown into several segments, with a segment of more than ten meters connected to the head, quickly moving and escaping deep in the crystal mine.

  Lin Fei also tightly grasped the metal rod inserted into Xialongs head, fortunately, Xialong blocked the repeated explosions from the ground, Lin Fei was lucky to have not been seriously injured. However, now Lin Fei dared not let go of the metal rod even more.

  Lin Feis current feeling is like riding a roller coaster without buckling up.

  The heavily injured shark, began to make its way back through a large hole dug out by a prisoner miner with a drill head. It started to shuttle quickly in the sand.

  Lin Fei held his breath, his body flat on the head of the sand dragon, his hands tightly grasping the metal rod inserted into the sand dragons head, feeling the pressure of the surrounding sand and rocks, as if his body was about to split open.

  Its okay, the variant salamander occasionally shuttles back and forth in the sand pile for a few minutes before going up to change its air for a few seconds and then continuing to burrow underground.

  However, the current variant of the sand dragons shuttling speed is really too fast, and the time to change breath is short. Lin Fei can only barely grasp the moment when the sand dragon drills out of the ground to change its breath, taking a few mouthfuls of air. At such high speeds, Lin Fei knows that if he lets go, with good luck, he will be tossed into the air and battered to death, and with bad luck, he will be trapped in the underground sand pile and suffocated to death.

  For this, Lin Fei could only desperately hold on, tightly grasping the iron rod exposed on the mutated salamanders head, hoping that this salamander, which had already lost more than half its body and was still bleeding non-stop, would soon exhaust itself and slow down, allowing him to get down.

  The variant saloon was still shuttling back and forth between the ground and the sandy land at a desperate speed, Lin Fei grasped the metal rod tightly, his eyelids were already unable to open, he could only rely on his instincts, if there was pressure around him, he would take a quick breath, and then hold his breath again.

  So, Lin Fei persisted for who-knows-how-long on the mutated sand dragons head before it finally came to a stop with a loud "thud", but tragically, it wasnt stopped on the ground, but rather crashed into an underground rock cave of unknown depth.

  Whats even more bizarre is that this mutated salamander crashed into a huge, silver-white, metallic gate with an unknown material in the underground rock cave.

  Thats right, it was a metal gate, a hidden silver-white metal gate that appeared under the Star of Innocence.

  "Ding dong, Variant Saloon defeated, host successfully completed the Brave Warriors Dragon Slaying task, completion rate 60%, evaluation C-grade."

  Ding dong, a unknown sci-tech underground building was discovered, with a sealed secret door. Scanning the graphics and documents, no records were found in the database.

  Dragon-slaying reward, in order to provide a higher survival rate for the host, a special reward of one Omnipotent Key is given.

  Master Key: Can open task door-shaped buildings. With the master key, no doors can stop your footsteps.

  "Cozy reminder: Are you ready to unlock the unknown technological secrets before your eyes?"

  Lin Fei, who was covered in aches and pains all over his body, had just climbed down from the corpse of this mutated sand dragon when the words of the Battle God System sounded out in his mind.

  Lin Fei looked around, unsure of whether he was tens or hundreds of meters underground. Except for the silver-white light emanating from the door in front of him, everything else was pitch black.

  Lin Fei reached out with his hand to touch the silver-white metal door, and saw that on the door were curved and tiny mercury-filled pipes, flowing on its surface like a chaotic circuit board.

  He barely killed a mutated salamander with his life on the line, only to be brought by the dying creature to this underground ghost place. In front of him was only one door, nothing else. The War God system was also stingy, giving him only one all-purpose key that could open the door.

  After messing around for half a day, I risked my life to get nothing. Now I have to rely on the only reward, a surname "Wan" universal key to open the door.

  Lin Fei thought to himself, there was no other way, and he didnt need to choose. If he didnt use the master key now, he could only wait for death in this underground depths. Compared to that, it was better to open the secret door and see if there was a way to escape inside.

  "War God System, use the omnipotent key once." Lin Fei said to the War God System in his mind.

  "War Gods product, must be a masterpiece"A fist-sized, golden key suddenly floated in front of Lin Fei and inserted itself into the silver-white metallic door with unknown technology in front of him.

  "Ka-cha, ka-cha" Along with the insertion of the golden key, the silver-white secret door began to crack and split from the middle, disintegrating. Beams of blue-white light radiated from the cracks in the door, but were all absorbed by the golden key, like sparks flying out when a circuit is shorted.

  A few minutes later, the golden key released a golden light that enveloped the entire silver-white secret door, and they disappeared together in front of Lin Feis eyes.

  "I fainted, Omnikey, it turns out that its quality is similar to a black hole, no wonder it can open any door, I thought it was so cool, but its just a [***]!" Lin Fei thought to himself, looking at the blue metal passage in front of him, which appeared due to the lack of silver-white secret doors. Many unfamiliar and strange symbols were rotating around the blue metal passage.

  No other choice, a dead pig isnt afraid of boiling water, Lin Fei stepped into the metal passageway, not finding anything uncomfortable, then began to walk towards the interior of the passageway.

  After walking about twenty meters, the blue metal passageway disappeared, and Lin Fei arrived beside a huge building that looked like an ancient altar.

  Lin Fei saw a building in front of him that was composed of hundreds of layers of stairs, similar to a glass pyramid. Inside the glass pyramid, a glass coffin floated upright.

  Inside the glass coffin, it was actually a girl who looked like she was eighteen or nineteen years old. She was naked, with shoulder-length silver hair, a slender figure, a melon-shaped face, small mouth and a pair of closed eyes. However, there was no expression on her face, although she looked very beautiful, but coldly pale, giving people a sense of chilliness.

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