Chapter 12: Fatal Decoding—Man and Machine as One

​The ticking of the pocket watch cut through the dead silence like a blade. Lya's mechanical right arm convulsed uncontrollably, the blue veins now creeping up her neck, her skin revealing the same gear-like vascular patterns her father had borne. She stared at the watch hovering above the altar and finally understood—

Her father had been the final lock.​

"Synchronization rate: 97%..." A mechanical voice spilled from her throat, unbidden. "New vessel adaptation progress: critical."

Renée gripped her shoulder hard enough to bruise bone. "Stop! Your father gave his life to seal this—are you going to break it with your own hands?!"

Lya's pupils dilated slightly, her retinas projecting a cascading stream of code only she could see. The fragments of her father's last memories reassembled in her mind—

(Flashback: Twenty years ago, Dr. Castro knelt in the same spot, his mechanical left arm plunged into the altar. The Grey Miasma seeped from the fissures, coiling around his body. Trembling, he pressed the pocket watch into his chest. The moment flesh fused with metal, blue light erupted.)

"Not… destroying…" Lya's voice was now one-third mechanized, the cadence disturbingly inhuman. "Rewriting… the protocol…"

The altar cracked like a spider's web, and thick, tar-like miasma surged from the fissures, twisting into three rotating lines of Mayan numerals in the air:

Ⅰ. Human civilization survival probability: 0.03%​

Ⅱ. Ecological restructuring completion: 92%​

Ⅲ. Core Key remaining energy: 00:02:17

The miasma lunged for Renée! Lya's mechanical arm intercepted on instinct, blue light clashing with the grey fog in a shower of sparks. Synchronization spiked to 99%—her right eye fully mechanized, the iris shifting into the same revolving gear pattern her father had borne in his final moments.

"Lya!" Renée's shout sounded distant, muffled, as if heard from underwater.

(Flashback intensifies: Her father's voice detonated directly in her neural pathways.)

"Listen… the star chart was a trap left by the ancients… they wanted it to be found…"

"The true key is… inside the—"

The memory cut off abruptly. Lya's mechanical hand suddenly stabbed toward her own chest! When the skin split, there was no blood—only the horrifying sight of a half-mechanical heart, its surface engraved with the same spiral patterns as the watch's interior.

"So… I was always part of the key…" Her voice crackled with static. "Father… hid a fragment inside me… twenty years ago…"

The miasma went berserk. Three shadowy figures erupted from the ground, charging the altar. Lya's mechanical heart blazed with blue light, resonating with the pocket watch. Her father's hologram flickered into existence one last time, his mechanized finger pointing into the writhing grey abyss—

"Behind the door isn't treasure… it's the entropic gods the ancients imprisoned… They want to use the Ark Protocol… to turn Earth into a breeding ground!"

Countdown: 00:00:59

Synchronization: 100%

Lya's skin began to metallize. In the last moments before consciousness slipped away, she did one final thing—

She plunged her bloodied mechanical finger into the keyhole of the pocket watch on the altar.