3621: C3621 Black Dragon Iron

C3621 Black Dragon Iron

2Lu Yu didn't pay any attention to him. Instead, his gaze fell upon the stone bricks on the city wall.

"This is not the current era's craftsmanship. This is the forging method from the ancient times. There was a large amount of Black Dragon Iron in the Middle Ancient Era. When it was used to make the bricks on the city wall, these iron scraps would mix in. It would make the walls indestructible. Even with the spirit stone Cannon, it would not be able to break through it!"

Lu Yu placed his hand on the wall and rubbed the feeling that came from the sturdy wall. He frowned deeply.

He had learned from the past and present, so he naturally knew some things that ordinary people didn't know.

The Black Dragon Iron had been cut off after that. Only the royal family and a few families had a small portion of it. It could only be used to temper some precious magic treasures and could not be used to forge the city wall.

Now, only some of the top cities, such as the imperial capital, Xiliang, and other cities, would use Meteoric Metal to pour into the walls.

However, even in the Middle Ages, the Black Dragon Iron was still a rare item.

To be able to use such a precious material to forge the city walls, it was definitely not an ordinary city.

"Wait! Trust me! The Spirit Star is just around Xiliang Manor. During the Middle Ancient Era, there were very few city walls that could be used to forge Black Dragon Iron. Could this be a ruin of a Middle Ancient City!?"

Lu Yu felt his heart beating uncontrollably.

The chaotic war during the Middle Ancient Era had caused many cities that had once been glorious to be buried in the eyes of everyone.

There were many treasures hidden in these cities that made people envious.

Some of the famous cities and the treasures inside were enough to attract Daolord's attention.

This was absolutely a great fortune!

Lu Yu even felt that the fate that he had been cultivating had changed his fate, causing everything that he had encountered to become unbelievable.

He walked along the city wall, and soon, he arrived in front of a huge city gate.

This city gate was completely closed, and there was only a lone city gate standing in front of him. There were no other decorations. The surrounding walls were still cold and strict, firmly guarding the things inside the city wall.

"I used all kinds of methods before, but I was unable to open the city gate, so I could only grind it bit by bit here." Tan Demon Immortal stood by the side, sighing and sighing.

Sitting on a treasure mountain but not being able to do so was the most helpless thing to do.

Lu Yu nodded and pressed his hand on the city gate.

Unexpectedly, the city gate only trembled slightly but did not open.

"This city gate is usually mixed with black dragon iron. Which city gate is this?" Lu Yu put his hand on it and his heart was in turmoil.

"Open it for me!"

Lu Yu suddenly shouted and took a step forward. A golden light flashed in his palm.

The power of a peak Martial Saint was unleashed!

Blood and Qi soared into the sky. At this moment, Lu Yu's full strength was like a fully drawn bowstring that was suddenly released, bursting out with an incomparably powerful force.

BANG!

His palm struck the city gate. Finally, this sturdy city gate let out a loud sound that shook the heavens.

The sound of metal hitting metal could be heard from the pitch black underground cave, but it did not stop for a long time.

The shaking of the city gate became more and more intense, and streams of force flowed on top of the city gate.

The moment the two city gates shook, a crack finally appeared in the city gate!0

Lu Yu's strength was equivalent to the strength of ten thousand people. He could move mountains and fill seas. He was omnipotent!

However, such a terrifying strength only managed to open a crack in the city gates!

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