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

Lin Feng had already pressed the tip of his knife against his throat, coldly saying, "The Sikong family captured you and brought you here to modify this furnace. What exactly do they want to refine?"

Looking at the cold blade, Mo Yan calmed down. He smiled bitterly, "What are we forging? We're forging something even immortals could cut. We're not forging iron; we're building a nest for 'it.' That thing... that thing is coming soon."

"What is it?"

Mo Yan shook his head, looked into the depths of the furnace, and murmured, "I don't know what it's called. I only know that the Sikong family brought materials from beyond the heavens to use this modified furnace to forge a weapon that can cut through this world."

Lin Feng was deeply shocked. Slicing through the world? A deadly weapon? Connecting this to the fragments in his possession, he instantly understood seven or eight parts of the story. The Sikong family had collected these fragments precisely to place them into this specially crafted furnace core for smelting!

The Sikong family's conspiracy is far more extensive than imagined, and this craftsman named Mo Yan is the key to unraveling all the mysteries.

"As for this furnace," Lin Feng glanced back at the silent steel behemoth, "from now on, it's mine."

He then signaled his personal guards to quickly search the entire underground space. Blueprints, tools, records—anything that could be taken was sealed up; anything that couldn't be taken was to be guarded closely.

Lin Feng noticed that after a brief moment of respite, Mo Yan's gaze remained fixed on the equipment, his eyes revealing a mixture of fear and professional instinctual reluctance.

"Mo Yan," Lin Feng walked to his side, "The Sikong family arrested you because you can read these blueprints and operate these machines. Now, I need you to do the same thing."

Mo Yan looked at him: "My lord, what you see is only the surface. The technology brought by the Sikong family far exceeds our imagination. They are not simply modifying the furnace, but implanting a set of 'internal organs' into it."

"What about those missing officials?" Lin Feng asked. "Did Cui Hong, the Vice Minister of Works, Lu Ming, the Censor, and Zhao Dequan, the Eunuch, come here?"

Mo Yan's eyes flickered, as if recalling something. "He came... about three months ago, Physician Cui came. He was furious, slamming his fist on the table and cursing that it was a waste of public funds and resources. After that... after that, he never left the mine. Imperial Censor Lu and Eunuch Zhao arrived later, apparently to investigate Physician Cui. They were taken to see the 'core area,' and returned pale-faced. That very night, they... disappeared."

Where is the core area?

"Right at the bottom of the furnace, deeper down."

Lin Feng fell into deep thought. Three big fish came in, saw what they shouldn't have seen, and were either silenced or imprisoned.

"Mo Yan," Lin Feng looked directly into his eyes, "I'm giving you freedom now, not the freedom to leave this cage, but the freedom to complete this 'work' with your own hands. The Sikong family only wants to use your skills, but I can let you see the final result. Isn't a craftsman's greatest glory witnessing the pinnacle of their life's work?"

Mo Yan gasped for breath, the despair fading from his eyes, replaced by a burning, almost frenzied light. His thirst for skill ultimately overwhelmed his fear of death.

"Okay..." he said hoarsely, "I'll take you to the control room."

Lin Feng followed closely behind Mo Yan, descending along a hidden maintenance passage. The passage was narrow and steep, with cold metal pipes on the walls, and the air grew colder the further down they went.

"Is this the core area you were talking about?" Lin Feng asked. At the end of the passage was a heavy alloy door.

"This is the last door." Mo Yan opened the door.

Behind the door was not a magnificent secret chamber, but a hemispherical underground space. In the very center of the space was the very bottom of Furnace No. 7 (Type C) – an empty slot wrapped in countless thick cables and pipes.

This is the true "hearth".

Mo Yan pointed to the empty card slot, his voice trembling with excitement: "My lord, look! This is the 'crucible' of the furnace core."

"How many 'crystal cores' are needed to start this furnace and refine something?" Lin Feng asked.

Mo Yan held up four fingers: "Four pieces. The design requires four complete 'celestial crystal cores' to form a stable energy circuit in the furnace core."

Four pieces.

Lin Feng knew perfectly well what was going on. He only had three pieces; he was one piece short.

"Mo Yan!" Lin Feng's voice was steady. "I don't care what method you use, even if you have to tear this place down, you have to guard this furnace for me! Don't let anything inside get hurt!"

Mo Yan nodded firmly: "As long as I'm here, the furnace will remain!"

Lin Feng took a deep look at the empty card slot. This "blade" was not yet forged, but he could already see the dawn of victory.

He turned and began climbing up the passage. Now that he knew he needed four fragments, the next task was crystal clear—find the fourth fragment!

"There's only one task now—find the fourth fragment. Once we have it all, this furnace will be my trump card."

The Iron Wall City garrison headquarters was brightly lit.

Lin Feng slammed a seized ledger onto the table. The ledger clearly recorded how the Sikong family used complex accounting methods and bribed local officials to infiltrate their personnel into the government mines and transfer some supplies to Qingming Mountain, among other illegal activities.

"What a bunch of scoundrels, the Sikong family! Their reach is longer than a thief's!" Xu Tiande was furious and slammed his fist on the table, making the candlelight flicker.

Lin Feng's gaze turned icy. "The fourth fragment is in the hands of the Sikong family. Since they refuse to hand it over willingly, we'll force them to give it to us with a knife."

The next morning, Lin Feng mustered five hundred personal guards, each with two horses and three days' rations, and headed straight for Qingming Mountain in the southwest.

Qingming Mountain is a treacherous place, historically plagued by bandits and local chieftains. The Sikong family, as the largest metallurgical family in the area, has operated here for centuries and enjoys immense prestige. Lin Feng knew that this trip was not to raid their home, but to venture into a den of wolves and tigers.

Upon reaching the Qingming Mountain Pass, the road suddenly narrowed. Steep cliffs rose on both sides, ancient trees reached for the sky, and a sense of oppressive silence enveloped the valley.

"Report—!" A scout galloped in, his face filled with terror. "Sir! The road ahead is blocked by boulders, and...and poisoned arrows! More than a dozen men in the vanguard have already fallen, poisoned!"

Lin Feng reined in his horse and squinted at the pass. Sure enough, it was piled high with huge logs and boulders, with sharp spikes coated in black tar visible in the distance. This was no merchant's house; it was clearly a fortress with impenetrable walls.

"General Xu, take a hundred men to feign an attack on the left flank and draw fire. The rest of you, follow me around to the right ridge and climb up!" Lin Feng made a quick decision.