Just when Lin Fei was desperate, the underground crystal mine began to explode one after another. The metal brackets and stones supporting the underground crystal mine began to roll down continuously. The mutant salon that was swimming around was also overturned by the sudden explosion and was hit by the large stones and metal sticks that landed later.

It turns out that although the crystal is resistant to high temperatures, it stores a large amount of energy inside. It is not a stable material. It cannot withstand the continuous high-temperature flames of the salon. Finally, the temperature reaches the zero-boundary blasting point of the crystal, and underground crystal ores begin to explode one after another.

This is why none of the fully armed prison guards above dared to come down after hearing the appearance of a fire dragon in the underground mining cave.

Lin Fei, who had never been exposed to the physical properties of crystal minerals, did not know the horror of crystal mining after encountering high temperature flames before this.

I didn't worry about going down the crystal mine without armor.

Explosions kept ringing, and the Mutant Salon no longer had the idea of ​​continuing to hunt down the surviving prisoners.

Its huge body was bombarded by the crystal mine explosion several times, and its hard scales could not withstand the impact of a large number of continuous crystal explosions. The body, which was originally fifty or sixty meters long, was actually blown into several segments, with a body that was more than ten meters long on its head, and it was moving and escaping quickly in the depths of the crystal mine.

Lin Fei also held the metal stick inserted at the head of the salon tightly. Fortunately, the salon below resisted the explosions from the ground again and again. Lin Fei was lucky enough to not suffer too serious injuries. However, Lin Fei dared not let go of the metal stick now.

Now Lin Fei feels like he is riding a roller coaster, but he still doesn’t have a seat belt buckle.

The seriously injured salon began to walk back from a large hole dug by a prisoner miner using a drill when it came. He began to quickly shuttle through the sand.

After holding his breath, Lin Fei lay flat on Sha Long's head, holding the metal stick inserted into the head of the salon with both hands, feeling the squeeze of the sand and stones around him, and his body seemed to be about to crack.

Fortunately, the Mutant Salon itself travels through the underground sand pile for a few minutes from time to time, and then goes up to change the air for a few seconds, and then goes underground to shuttle.

However, the mutant salon is too fast at this moment, and the ventilation speed is short. Lin Fei can only barely grasp the moment when the salon crawls out of the ground to breathe and take a few breaths. Under such high speed, Lin Fei knew that once he let go, if he is lucky, he will be caught in the air and fall to death. If he is not lucky, he will be stuck in the underground sand pile and suffocated to death.

For this reason, Lin Fei could only persist desperately, holding the iron stick exposed on the salon's head, hoping that this mutant salon, which had lost most of its body and was still bleeding, would soon be exhausted by himself so that he could reduce the speed and let him go.

The mutation salon was still shuttled through the ground and under the sand at a desperate speed. Lin Fei grabbed the metal stick tightly, and his eyelids could no longer be opened. He could only rely on gratitude. If he had a little pressure around him, he would breathe quickly and then hold his breath back.

In this way, Lin Fei didn't know how long he had been on the head of the mutant salon. After a "bang" hit, the mutant salon finally stopped. However, the tragic thing was not stopping on the ground, but hitting into a rock cave that was unknown how deep it was underground.

What's even more strange is that this mutated salon hit a huge silver-white gate made of metal in the underground cave.

That's right, it's a metal gate, a hidden silver-white metal gate that appears under the ground of the Innocence Star.

"Dingdong, the mutant salon died, the host successfully completed the Dragon Quest mission, with a completion rate of 60%, and a C-level evaluation.

Dingdong, an unknown underground building with a closed door was discovered. Scan the pictures and texts, but the database has no records.

Dragon Slaying Reward, in order to provide the host's survival chance, special rewards one-time master key*1,

Master Key: You can open the quest door-shaped building. With the master key, no door can stop you from walking.

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

Lin Fei, who was sore all over, had just crawled down from this dead mutant salon, and these words rang out of the God of War System in his mind.

Lin Fei looked around and didn't know whether he was tens of meters deep or hundreds of meters deep underground. Except for the secret door in front of him with silver-white light, the rest of the place was dark.

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

He was a ball ball, and I almost killed a mutant salon. However, before he died, he was taken to this underground ghost place by the mutant salon. There was only one door in front of him and nothing else. The God of War System was even more stingy and only gave himself a master key that could open the door.

After working on it for a long time, I risked my life and didn’t get anything now. I also have to rely on the one-time master key to open the door with the only reward.

Lin Fei thought in his mind that there was no way, and in fact he didn't have to choose. If he didn't use the master key now, he could only wait for death deep underground. In contrast, he would still open the secret door to see if there was any way to get out of trouble.

"The God of War System, use a one-time master key." Lin Fei said to the God of War System in his mind.

"Produced by the God of War, it must be a fine product." A fist-sized golden key suddenly floated in front of Lin Fei's head, and he inserted it hard into the silver-white secret door made of unknown technology in front of him.

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

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

"I'm so impatient, the master key, it turns out to be similar to a black hole. No wonder it can open any door. I thought it was so arrogant that it was a violent demolition!" Lin Fei thought to himself, looking at the slender blue metal channel that appeared in front of him because of the lack of silver-white secret doors, and many strange-shaped runes that he didn't recognize were rotating 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 without finding any discomfort, and then began to walk inside the passage.

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

Lin Fei saw a building similar to a glass pyramid composed of hundreds of stairs in front of him. Inside the glass pyramid, a glass coffin was erected and suspended.
Chapter completed!