Lu Yu ignored him and instead looked at the stone bricks on the city wall.

"This is not the craft of this era, it is the forging method in the Middle Ages. There were a large number of black dragon irons in the Middle Ages. When making city wall bricks and stones, these iron filings would be mixed into it, making the walls indestructible, even if they were using spirit stone cannons.

Unbreakable!"

Lu Yu placed his hand on the wall, rubbing the feeling coming from the solid wall, and frowned.

He has mastered ancient and modern times, so he naturally knows something that ordinary people don’t know.

The Black Dragon Iron was later cut off. Only the royal family and a few families owned a small part. They could only be used for the tempering of some precious magic weapons and could not be used to cast city walls at all.

Now only some top cities, such as the Imperial Capital Xiliang, will be poured into the wall bricks with meteorite iron outside the territory.

But even in the Middle Ages, black dragon iron was also a rare thing.

It is definitely not an ordinary city that can cast city walls with such precious materials.

"Wait! The Xinling Star is around Xiliang Prefecture. In the Middle Ages, there were very few city walls that could melt the black dragon iron. Could this be the ruins of an ancient city!"

Lu Yu felt that his heart couldn't help but beat.

The melee in the Middle Ages has caused many once glorious cities to be buried in the eyes of everyone.

There are many treasures hidden in these ancient cities.

Even some famous cities and treasures are enough to attract powerful people of the Taoist level.

This is definitely a shocking fortune!

Lu Yu even felt that the fate he had cultivated had changed his fate, making everything he encountered became incredible.

Walking along the city wall, Lu Yu soon came to a huge city gate.

The city gate was completely closed, with only a lonely city gate standing in front of him, and there was no extra decoration. There were still cold walls around him, which firmly protected the things inside the city wall.

"I used all kinds of methods before going down, but I couldn't open the city gate, so I had to grind it a little bit here." Tan Yaoxian stood aside and sighed.

It is the most helpless thing to have a treasure mountain but not avail.

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

But unexpectedly, the city gate just 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 a storm was already stirring up in his heart.

"Display it for me!"

Lu Yu suddenly shouted loudly, stepped out, and a golden light flashed in his palm.

The peak power of the Martial Saint burst out directly!

The blood and energy surged into the sky. At this moment, Lu Yu's full strength seemed to be a full bowstring, suddenly letting go, bursting out with extremely powerful power.

Bang—

The palm of his hand hit the city gate, and the hard city gate finally made a shocking sound.

The sound of metal and stone clashing in the originally dark cave underground continued to be heard, and it never stopped for a long time.

The city gate was shaking more and more violently, and the force was wandering above the city gate.

The moment the two city gates were shaking each other, a crack finally appeared in the city gate!

Lu Yu's power is equivalent to the power of ten thousand people, and he can move mountains and fill the seas and do everything!

But such a terrifying power only shakes the city gate a crack!
Chapter completed!