With the sword of the bloodline, the basic outline of the inside of the hall can still be seen clearly, and after the two of them slowly stepped into the door, the bronze door behind them was suddenly closed, and the sound of metal colliding echoed in this empty bronze hall.

The two of them walked forward, looking at the surrounding walls through the faint light, the air here was extremely dry, not at all like the great hall that existed under the sea, and there was an occasional breeze in the hall, but it did not have the salty smell of the sea breeze, but the special smell of metal.

Approaching the surrounding walls, the two also found that there were not all bronze walls on the walls, but some mural-like existences.

Mu Yunfei slowly raised the Bloodline Sword and illuminated the mural in front of them.

I saw that in the center of the mural, there was a huge black snake, which was the snake they had just encountered, and under the snake was an ocean.

Looking up at these figures, it seemed that several figures were falling downward, and above their heads, the tail of the black snake was shooting towards them.

"This mural depicts as if we were just in the state. Nana whispered.

"Yes, it's the same as the state we were in just now, but there is a slight difference, this snake has a pair of horns on the top of its head, and it didn't attack us just now, and the two don't seem to be a snake. Mu Yunfei said in a deep voice.

As he spoke, he pulled Nana and continued to walk forward, and next to the mural just now, there was another mural, with a sword and a light cover, revealing the appearance of the mural.

I saw a huge bronze door appear on the mural, and there was a circle in the center, and the circle was covered with the silver-white ball.

Not only that, in front of the bronze door, there are also two people's backs, but judging from the backs, they can also distinguish that they are a man and a woman, just like they are at this time, but what they can be sure of is that those two people and the two of them are definitely not the same person.

After taking a few steps forward, they found that next to the mural just now, there were actually two murals, one on top of the other.

Holding the sword of bloodline high, looking at the mural on it, I saw that the bronze gate was still closed, but the two people in front of the door had changed directions, the woman was still standing in the distance, but the man was close to the bronze door, and when he looked closely, his expression was extremely painful, and he seemed to be sucked away by the silver-white ball.

The picture below is still the bronze door, but the man is standing next to the woman and does not step forward, but the bronze door in front of him is strange, only to see that from the bronze door there are a few small snakes, with fangs open, twisted in front of the two people, which is terrifying.

Mu Yunfei compared the upper and lower paintings, and seemed to have a little guess in his heart, he said in a deep voice, "The bronze door just now, there seem to be two possibilities, if the silver-white ball in the center does not choose to absorb the power of your blood, not only will it not open this bronze door, but it will also trigger the second situation, that is, a few black water snakes will emerge from that circular area, and they will take their lives directly." ”

And after these two frescoes, they merge together again, or to be more precise, the top fresco connects to the next, and the bottom one stops there.

After the two passed a serpentine stone statue on the right hand, they came to the next mural, and the moment the two came to the mural, the lower right corner of the mural in front of them suddenly lit up with a little golden light, echoing the sword of blood in Mu Yunfei's hand.

Not only that, but there were faint flashes of golden light in the originally dim murals, which seemed to guide something, and seemed to be a route-like existence.

And when the two of them approached and looked at the source of the golden light in the lower right corner, they were surprised to find that it was actually a small ball, shining with a faint golden light, but it was somewhat similar to the silver ball outside.

Mu Yunfei glanced at Nana beside him, but he saw the worry in Nana's eyes, as if he was worried that Mu Yunfei would be the same as just now after touching it, or worse.

She stepped forward and grabbed Mu Yunfei's left arm tightly, and walked with him to the front of the golden ball.

Mu Yunfei smiled, touched Nana's head, and said softly, "It's going to be fine, I'm a golden blood." There was a hint of relaxation in his tone.

However, although he pretended to be in such a state because he wanted Nana to rest assured, he was still not very sure in his heart, and after taking a deep breath, he stretched out his right hand and touched it towards the golden ball.

The feeling of warmth and moistness passed into his body along his fingertips, and there was no sense of pulling, and the power of the blood veins in his body was still flowing quietly in his body, not only that, but the energy gushing out of the golden ball was actually a little strange, extremely strange, but it was a little familiar.

Mu Yunfei stood there calmly, silently feeling the changes in his body, feeling the warmth brought by this golden ball and fusing with the power of his bloodline little by little.

It felt as if someone had injected the power of your bloodline for you and forcibly increased your strength, but the most important thing was that this operation did not have any side effects at all, not even a trace of pain.

Nana had already let go of Mu Yunfei's left arm at this time, standing not far away, watching Mu Yunfei's changes at this time, and could also feel the fusion of the golden ball and the huge blood force between Mu Yunfei.

Time passed minute by minute, and the golden light around Mu Yunfei's body became more and more intense, and the bloodline sword had reintegrated into his body at some point, but even so, with the golden light emitted from around his body, it could still illuminate the surroundings of the two of them, and even the distance of the main hall.

I don't know how long it took, but the light on the golden ball had gradually faded, revealing the original appearance of the ball.

And when the last trace of golden light merged into Mu Yunfei's body, a strange sound could be faintly heard, like the dragon groan of some ancient dragon.

But at this time, Mu Yunfei was not concerned about this, but about the changes in his body at this time.

The entry of that strange energy just now seemed to be recharged, and almost instantly, it was filled with the power of the bloodline in his body, which was originally a little empty due to the increase in the bloodline level, and there was still a slight breakthrough potential.

Mu Yunfei sat down cross-legged, feeling the changes in his body, and then used the power of the blood veins in his body, absorbing all the strange energy that had not been absorbed by him just now.

The golden light around his body became more and more intense, which also made the entire bronze hall brighter.

Suddenly, the power of the blood veins that was constantly surging in the body seemed to have found an outlet, and it was rushing in one direction, as if it had broken through some confinement, and rushed towards a place that Mu Yunfei had never felt.

Yes, Mu Yunfei could feel that he had broken through, that is, under the input of the energy attached to the golden ball just now, he had broken through to the middle level of the mid-level golden bloodline, although it was a small level of promotion, but for the existence of his level, it was already a good improvement.

Moreover, he is only less than 19 years old.

Mu Yunfei slowly opened his eyes, he knew that he was already able to materialize the power of the bloodline, he looked around with the golden light around his body, and then slowly stood up.

He looked at Nana beside him, with a faint smile on his face, gently took Nana into his arms, and said softly, "It's hard work Nana." ”

"Congratulations, you can break through here!" Nana smiled, her man is so good, for her, it is also a happy thing, besides, in the current unknown environment, the stronger the strength, the greater the chance of their survival, and the greater the chance that they can get out safely.

Mu Yunfei looked behind him, but he saw that at some point, a platform had risen in front of the hall, and there were several steps between the platform and the plane they were on at this time.

The two of them slowly approached, and walked up the bronze steps, and saw the existence on the platform.

There were no luxurious bronze ornaments on the platform, and there were no other items, just a small square area, and the two of them slowly squatted down next to the square area, but they were surprised to find that the edge of the square area was actually a certain distance from the surrounding ground.

Mu Yunfei and Nana glanced at each other, and said almost at the same time, "There's something down there!"

This square area is about a square of four square meters, that is to say, the square lid on this area generally exists four square meters, and the thickness is about three inches, you don't have to think about it to know that its weight is definitely not something that ordinary people can open, even if you know that there is something underneath, but it is impossible to open it.

However, Mu Yunfei and Nana are not ordinary people.

I saw Mu Yunfei take a deep breath, and the light around his body brightened a little more, and then he stretched his hands into the gap in the square area, buckled into the bottom, and pulled up.

"Boom—"

The sound of stones and metal grinding and clashing sounded, but it was only a simple sound that restored calm, and the entire square bronze lid moved tightly for a minute and then did not move.

This also made the two of them shocked for a while, and they also had some doubts about this bronze cover.

Mu Yunfei stretched his shoulders and arms, and then he unleashed the Yuan Qi Devour, which also made the power of his bloodline reach its peak at this moment, and the bloodline sword flew into his hand and was inserted into the gap as a lever.

"Bang-"

The bronze lid was pried up, and with a wave of inertia, it flew directly out of the original square area, hitting the bronze wall in the distance.

And in the next second, there was a roar from the square area in front of them, the voice was extremely hoarse, but it was extremely shocking, and just sounding it couldn't help but make the two of them tremble.

.........

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