The Obsidian Tower did not sit upon the mountain; it pierced through it, like a needle through a tapestry. As Shin and the original Sung Byeon approached the entrance, the atmospheric pressure began to fluctuate wildly. It wasn't a weather pattern; it was a Data Congestion. The air felt thick, metallic, and tasted of ozone and burnt silicon.
"The 'Dead Zone' ends here," Shin said, his Helix Nebula eyes scanning the shimmering walls of the tower. "Inside, the rules of physics are secondary to the rules of the Narrative. If the 'Author' wrote that a stone falls upward, then g becomes a negative value. Do not trust your equilibrium."
"I don't even trust my own hands anymore," the real Sung Byeon muttered, looking at his fingers, which were still trailing faint digital artifacts. "Why does this place look like a tomb?"
"Because it is," Shin replied, placing his hand on the obsidian surface. "It's the graveyard of every discarded plot point and every 'Useless' character that didn't make the final cut. Including, potentially, you."
1. The Entry: Gravitational Flux
The moment they stepped inside, the floor vanished.
They weren't falling; they were suspended in a void of endless, floating bookshelves that stretched in every direction—up, down, and across planes that defied three-dimensional geometry. There was no "Down" because the Gravitational Constant (G) had been set to a null value.
"Shin! I'm drifting! Help!" Sung Byeon flailed, his body spinning slowly in the weightless vacuum.
Shin didn't panic. He reached into his mana core and projected a localized field of Artificial Gravity. He didn't create a floor; he simply defined a new "Down" by manipulating the Higgs field in a five-meter radius.
F = GMm
g -----------
r²
"Focus on my frequency," Shin commanded. "I'm tethering your mass to mine. In this Archive, if you lose your sense of self, the System will categorize you as 'Unallocated Data' and compress you into a footnote."
They drifted toward a central pillar made of glowing fiber-optic cables that pulsed like a heartbeat. This was the Central Processing Unit of the world's history. As they landed on a floating platform, the air shimmered, and a new threat emerged—not Administrators, but Echoes.
2. The Echo Chamber: Narrative Friction
The Echoes were translucent figures that looked like previous versions of Shin and Sung Byeon. They were "Drafts"—iterations of the characters that had been deleted for being too weak, too strong, or too boring.
One Echo, a version of Sung Byeon with a scarred face and a sword made of frozen light, stepped forward. "You shouldn't be here, Transmigrator," the Echo hissed. "You're a patch. A hotfix sent to save a failing story."
"I am the solution to a structural error," Shin countered.
The Echoes attacked. They didn't use physics; they used Scripted Events. The scarred Sung Byeon swung his sword, and the air itself split into a "Cutscene." Time slowed down for everyone except the attacker. It was a Narrative Priority strike—a move that was written to always land first.
Shin felt the "Script" trying to lock his limbs in place. The System was telling his brain that he was currently in a "Stunned" state.
"I don't follow the script," Shin whispered. "I follow the Laws of Thermodynamics."
He couldn't move his body due to the narrative lock, but he could move the energy around him. He triggered a Thermal Expansion in the air molecules between him and the Echo. By rapidly increasing the internal energy (U) of the gas, he created a high-pressure shockwave that forced the "Cutscene" to jitter.
∆U= Q-W
The narrative lock broke under the sheer physical pressure. Shin stepped out of the way of the light-sword, his eyes glowing a fierce, radioactive violet. He didn't strike back with a fist. He reached out and touched the Echo's chest, specifically targeting the Binding Energy holding its digital molecules together.
He withdrew the "Strong Nuclear Force" from the Echo's localized space. Without the force to hold its atoms together, the version of Sung Byeon didn't just die—it dissolved into a cloud of subatomic particles, returning to raw data.
3. The Source Code Revealed
They reached the heart of the tower—a chamber filled with "Source Books." These weren't physical books, but holographic cubes that contained the life-paths of every entity in the world.
Shin found the cube labeled [Character_ID: Sung_Byeon_001].
He tapped the cube, and the room was filled with a projection of the "Original Save File." He saw the real Sung Byeon—the playboy, the coward, the boy who was destined to die in Chapter 1 to motivate a "Real Hero."
"I was a sacrifice?" the boy whispered, tears blurring his vision as he watched the projected scene of his own scripted death. "I was just meant to be a 'Useless' plot device?"
"Everyone is a plot device until they realize they can edit the page," Shin said.
Then, he found his own file. But it wasn't a character file. It was a System Override Command.
[Project: SHIN — The Universal Constant]
Purpose: To stabilize the narrative by applying rigid physical laws to a decaying magical reality.
Origin: Dimension X-99 (Hard Science Sector).
"I wasn't invited here by a god," Shin realized, his voice dropping to a cold, analytical tone. "I was imported by the System itself because the 'Magic' in this world was becoming too chaotic. I am the 'Hard Magic' patch meant to bring order to the 'Soft Magic' madness."
4. The Singular Point: The Final Defense
The Archive didn't like being read. The central pillar turned a violent shade of crimson, and a System Wipe began. The floating bookshelves began to collapse into a central point of infinite gravity—a Singular Point designed to crush the Archive and everything in it to prevent the "Source Code" from being leaked.
"Shin! Everything is being sucked in!" Sung Byeon screamed, gripping the edge of the platform as the holographic cubes were torn away.
Shin looked at the growing black hole in the center of the room. This wasn't a natural black hole; it was a Data Sink.
"If the System wants to compress the data," Shin said, stepping toward the abyss, "I'll give it more mass than it can index."
He didn't try to close the hole. He used Applied Quantum Mechanics. He began to duplicate his own digital signature, creating millions of "Virtual Particles" in the space around the Singularity.
E=mc²
He converted his vast mana reserves into pure informational mass. He flooded the Data Sink with so much complex physics—equations on fluid dynamics, quantum entanglement, and general relativity—that the "Singular Point" suffered a Buffer Overflow.
The black hole stuttered. It couldn't calculate the infinite variables Shin was throwing into it. With a final, massive surge of power, Shin triggered a Hawking Radiation burst, forcing the singularity to evaporate into a blinding flash of white light.
The Return to the Surface
When the light faded, they were back on the snowy peaks of the Iron-Vein Mountains. The Obsidian Tower was gone, replaced by a massive crater in the rock.
The real Sung Byeon sat in the snow, shivering. He looked at Shin, who was standing perfectly still, his eyes slowly fading from violet back to navy blue.
"So... what now?" the boy asked. "If we know the 'Source Code,' are we free?"
"No," Shin said, looking at his hand. His skin was flickering, a sign that his "System Override" was becoming permanent. "Now that we know the Author's secret, we aren't just anomalies. We are Protagonists. And the System doesn't let its protagonists go until the story reaches its 'Ending'."
Shin looked toward the horizon, where the city of Oakhaven lay. He could see the "Source Code" of the trees, the wind, and the people.
"I came here to survive," Shin whispered. "But now, I'm going to rewrite the ending. And it starts with finding the 'User' who thinks they own this POV."
As they began the descent, the "Useless's POV" title card in the sky flickered and changed. It now read: [POV: THE ARCHITECT].
[End of Part 4]