Too many female prisoners, a special forces soldier transmigrates and marries wildly.

Iron Wall City.

After finishing several official tasks, Lin Feng put down his pen and rubbed his temples. He remembered the strange metal sheet wrapped in oilcloth.

He walked outside and said to the guards on duty, "Go and invite Miss Bai Xiaohe over. Also, have Amur and Batu prepare to accompany me out."

Before long, Bai Xiaohe appeared silently at the door of the study.

"Miss Bai, come with me to the blacksmith shop in the west of the city," Lin Feng said.

Bai Xiaohe didn't ask any further questions, only nodding: "Yes."

Amur and Batu were already waiting in the courtyard, both of them dressed in casual clothes.

Lin Feng instructed Amur: "You follow behind, keep some distance, and be aware of your surroundings."

"clear."

In the west of the city, the furnace of "Wang's Blacksmith Shop" is burning brightly, and the clanging sound of hammering can be heard incessantly.

The shop owner, Old Wang, was an old blacksmith in his fifties.

Seeing Lin Feng enter with his men, Old Wang stopped hammering and grinned, "Commander Lin! You're finally back! ...What do you need? Or perhaps to repair your weapons?"

"Master Wang, excuse me." Lin Feng took out a bundle of oilcloth from his pocket and carefully opened it on the wooden table next to the forge. "I'd like to ask you to take a look at this. What is it? And could you... forge it?"

The oilcloth was unfolded, revealing a dark blue, irregularly shaped metal sheet with a faint blue luster.

Old Wang's smile froze instantly.

He moved closer, his cloudy eyes fixed on the fragment, then picked up a small pair of tongs and carefully picked it up, bringing it closer to the fire, squinting as he examined it closely. He then gently tapped the edge of the fragment with the tongs, listening intently.

"Ding..." The sound was extremely crisp and long, with a lingering resonance, completely unlike ordinary metal.

Old Wang's expression grew increasingly grave. He put down the pliers and picked up a finely hardened steel file that he often used, attempting to file the edge of the shard.

With a very slight scraping sound, a few tiny steel shavings broke off from the file, but the edges of the shavings remained smooth as ever, without even a trace of white residue.

Old Wang gasped. He grabbed a small iron hammer and used all his strength to strike a corner of the fragment.

"Clang!" Sparks flew everywhere, but the fragments were unharmed, instead chipping a small dent into the hammerhead.

"This...this..." Old Wang's forehead was covered in sweat, and his voice trembled with disbelief.

"Guard, this thing... I've been a blacksmith my whole life, and I've never seen anything like it! It's definitely not ordinary iron! No, I'm afraid... it's something we can't possibly have here!"

"What do you mean?" Lin Feng asked.

Old Wang put down his tools, wiped his sweat, and his eyes fell into reminiscence:

"When I was young, about thirty years ago? I was still in the Shuofeng Army's craftsmanship camp. I heard a knowledgeable old craftsman from outside the camp mention it. He said that there are some rare and precious metals in this world that cannot be melted by human furnaces or forged by ordinary techniques. Some are buried deep in the earth's core and become spiritual over ten thousand years; some... simply fell from the sky, carrying starlight, and are very strange."

He pointed to the fragment: "Look at the texture, the luster, the weight, and the eerily hardness... it's somewhat like the 'heavenly iron' that the old craftsman mentioned! But that's just a legend!"

"Heavenly Black Iron?" Lin Feng's mind stirred slightly.

"Yes, that's what the old craftsman said. He also said that sometime earlier, during the previous dynasty, there really was a time when fire fell from the sky, and this strange iron fell down, but it shattered upon landing, breaking into... I think four pieces? Four people picked them up, and when the story spread, the four pieces were each taken by four experts. Later... later, we never heard of it again. Some of those who got the pieces attracted enemies who fought over them, and they lost their lives, and the pieces disappeared without a trace. In short, no one succeeded, and instead, they caused a lot of trouble."

Four pieces? Lin Feng's eyes narrowed. Could the piece in his hand be that quarter? No wonder its shape was irregular, as if it had broken off from a whole.

"Master Wang, in your opinion, is there really no way to forge this?"

Old Wang smiled bitterly and shook his head vigorously.

"It's not that I'm shirking my responsibility. You've seen it yourself; it can't be filed, it can't be bent, it can't be melted. To deal with this thing... I'm afraid we'd need the legendary 'earth's core fire' or 'heavenly thunder hammer'! I'm truly at a loss. This thing, to me, is a treasure I can see and touch, but I can't use—no, it's a source of trouble!"

He spoke frankly and honestly.

Lin Feng remained silent for a moment, then carefully wrapped the fragments again in oilcloth and put them away. "Thank you for your guidance, Master Wang. Please don't mention today's events to anyone else."

"I know what's important! Don't worry, sir!" Old Wang assured him repeatedly.

Leaving the blacksmith shop, Lin Feng walked ahead, Bai Xiaohe lagged half a step behind, and Amur and Batu followed far behind.

"Does the defender need to find the other three fragments?" Bai Xiaohe suddenly asked.

"That's what I meant." Lin Feng wasn't surprised that she could guess it.

"This item is extraordinary. If we can gather them all, we might be able to forge a divine weapon, which would be of great use to the country and its people. However... the clues are scarce, and the three owners of the item are probably not easy to deal with."

"Since it happened thirty years ago, with the changes in people and things, the fragments may have changed hands several times and been scattered in various places," Bai Xiaohe analyzed.

"I know," Lin Feng said, gazing at the bustling crowd at the end of the street. "But it's worth a try. For Ironwall City to establish itself, soldiers alone are not enough; it also needs powerful weapons. This matter requires careful consideration."

He already had a plan in mind. Finding out the whereabouts of the other three fragments was destined to be a long and dangerous journey.

Just as they reached a relatively quiet street corner, Bai Xiaohe paused, her eyes glancing at the shadows of a narrow alley behind her.

"Someone's following us." Her voice was very low, her hand already on the hilt of her sword.

Lin Feng remained unmoved, as if he hadn't heard, and continued walking forward, muttering to himself, "I know, no need to alarm her. Let's see what she's up to."

The other party was very patient, just keeping a distance and showing no signs of approaching or making a move.

Reaching the middle of the alley, in a secluded corner piled with miscellaneous items and rarely visited by anyone, Lin Feng suddenly stopped, turned around, and addressed the empty alleyway entrance in a loud voice: "Since Miss Su has come, why not show yourself? Such concealment is unbecoming of Linglong Pavilion."

A moment of silence.