Just when Lin Fei was desperate, the "boom boom" underground spar mine actually began to explode one after another. The metal supports and stones that supported the underground spar began to tumble down, and the mutant salon that was swimming around was also overturned by the sudden explosion, and was hit by the large stones and metal rods that fell later.

It turns out that although the spar is resistant to high temperatures, the spar with a large amount of energy stored inside is not a stable material, and it cannot withstand the continuous high-temperature flame spray of the salon, and finally the temperature reaches the zero boundary blasting point of the spar, and the underground spar mine begins to explode one after another.

This is also the reason why after hearing that Charizard appeared in the underground mining cave, none of the heavily armed prison guards above dared to come down.

Lin Fei, who had never been in contact with the physical nature of the spar mine, did not know the horror of the spar mining after encountering the high temperature flames before.

There is no scruple to go down the spar mine without armor.

The explosions kept ringing out, and the mutant salon had no idea of continuing to hunt down the surviving prisoners.

Its huge body was bombarded several times by the explosion of the spar mine, and its hard scales could not withstand the impact of the continuous explosion of a large number of spars. Sharon's body, which was originally fifty or sixty meters long, was actually blown into several pieces, and his head was connected to a body more than ten meters long, and he was moving quickly in the depths of the spar mine to escape.

Lin Fei also clenched the metal rod inserted in the head of the saloon, fortunately, the saloon below resisted the impact of explosions from the ground again and again, and Lin Fei was lucky not to be too seriously injured. But now Lin Fei didn't dare to let go of the metal stick.

Now Lin Fei feels like riding a roller coaster, and he still hasn't buckled his seat belt.

Sharon, who was badly wounded, began to slip back through a large hole dug by a prisoner miner with a drill when he came. Began to weave quickly through the sand.

After Lin Fei held his breath, his body lay flat on the head of the salon, his hands clenched the metal rod inserted into the head of the salon, feeling the squeeze of the sand and stones around him, and his body seemed to be about to crack.

Fortunately, the mutation salon himself shuttles through the underground sand pile for a few minutes from time to time, and then goes up to change his qi for a few seconds, and then goes underground to shuttle.

However, at this moment, the shuttle speed of the mutant salon was too fast, and the speed of ventilation was also short, Lin Fei could barely grasp the moment when the salon drilled out of the ground to breathe, and took a few breaths. Under such a high-speed movement, Lin Fei knew that once he let go, if he was lucky, he would be swept into the air and fall half to death, and if he was unlucky, he would be stuck in the underground sand pile and suffocated to death.

For this reason, Lin Fei could only desperately hold on, holding the iron rod exposed on Sharon's head, hoping that this mutated salon, which had lost most of his body and was still bleeding, would quickly exhaust himself, so that he could slow down and let him go down.

The mutation salon was still shuttling between the ground and the sand at an unfathomable speed, Lin Fei was clutching the metal rod tightly, his eyelids couldn't be opened, and he could only rely on gratitude, if there was pressure around him, he would take a quick breath, and then hold his breath.

In this way, after Lin Fei held on to the head of the mutation salon for a certain amount of time, he hit it with a "bang", and finally the mutation salon stopped, but the tragedy was not that it stopped on the ground, but that it hit a rock hole that was unknown how deep it was.

What's even more bizarre is that the mutant saloon crashed into a huge silvery-white glittering gate made of unknown metal in the underground cavern.

That's right, a metal gate, a hidden silver-white metal gate that appears beneath the Innocence Star.

"Ding Dong, the mutant salon died, and the host successfully completed the Dragon Quest mission, with a completion rate of 60% and a grade of C.

Ding Dong, an underground building of unknown technology was discovered, and a secret door was closed. Scanned pictures and texts, there is no record in the database.

Dragon slaying reward, in order to be able to provide the host with the chance of survival, a special reward is given a surname master key*1,

Master Key: You can open the quest door-shaped building, and with the master key, no door can stop you.

Tips: Do you use it to open the secret door of unknown technology in front of you? ”

Lin Fei, who was sore all over, had just crawled down from this dead mutant salon when these words sounded in his head from the God of War system.

Lin Fei looked around, not knowing if he was now dozens of meters deep underground, or hundreds of meters deep, except for the secret door in front of him that flashed with silver-white light, the rest was dark.

Lin Fei tried to touch the silver-white metal door with his hand, and saw that the door was like a messy circuit board, and the bent and thin mercury pipes were flowing on it.

He was a ball, Lao Tzu almost killed a mutation salon, but before the mutation salon died, he was taken to this underground ghost place, there was only one door in front of him, nothing else, and the God of War system was even more stingy, only giving himself a master key to open the door.

After a long time, I risked my life and now I haven't caught anything. You also have to rely on the only reward to open the door with a master key.

Lin Fei thought in his mind, there was no way, in fact, there was no need to choose, if he didn't use the master key now, he could only wait for death in the depths of the ground, in contrast, it was better to open the secret door and see if there was any way to get him out of trouble.

"God of War system, use the surname master key once." Lin Fei said to the God of War system in his mind.

"Produced by the God of War, it must be a high-quality product" A fist-sized, golden key suddenly suspended in front of Lin Fei's brain, and slammed into the silver-white secret door in front of him that he didn't know what technology it was.

With the insertion of the golden key, the silver-white secret door began to break and decompose from the middle, and a blue-white light emitted from the crack of the secret door, but it was absorbed by the golden key, like an electric spark from a leakage.

A few minutes later, the golden light emitted by the golden key enveloped the entire silver-white secret door and disappeared in front of Lin Fei's eyes.

"I'm faint, the master key, it turns out to be similar to the surname of a black hole, no wonder I can open any door, and I thought it was a [***]!" Lin Fei thought to himself, looking at the slender blue metal channel in front of him because of the lack of a silver-white secret door, many strange-shaped runes that he didn't know were revolving around the blue metal channel.

There was no other choice, the dead pig was not afraid of boiling water, Lin Fei stepped into the metal passage, and after finding no discomfort, he began to walk towards the inside of the passage.

After walking for about twenty meters, the blue metal passage disappeared, and Lin Fei came to the side of the huge ancient altar-like building.

Lin Fei saw a glass pyramid-like building composed of hundreds of stairs in front of him, and inside the glass pyramid, a glass coffin was erected and suspended.

In the glass coffin, there was actually a girl who looked ten ** years old, naked, with silver hair in a shawl, a slender figure, a melon seed face, a small mouth and a pair of closed big eyes, but there was no expression, although the appearance was very good-looking, but cold, giving people a cold feeling.