Mercury runes in the space-time alchemical factory suddenly erupt into a coordinate storm. The 14th-generation host slashes a rift with her scalpel and plummets into the "Zero Point of Time-Space"—a basement in a medieval manor. Liquid space-time dust flows here, and alchemical runes condense on stone walls into ancient inscriptions of contract clauses. At the central altar hover Sebastian's mercury head and immortal body, his left gem eye flaring red as gear sounds from his mechanical heart mix in: "You've found the origin of the blood contract, but the key can't reverse my immortal plan."
The host's chaotic purple pupils scan the basement, discovering the iron-masked ancestor's skull phantom suspended from the dome, its deep blue light intertwined with Sebastian's tampered codes. Mercury skin corrodes the floor, revealing the first blood shed when the contract was signed—dark red runes congeal on the stone slab, mingling with the annihilation energy of hosts and Sebastian's space-time manipulation logic.
"The first blood holds the contract's ultimate key." The host's mechanical heart blazes blue as she stabs her scalpel into the slab, force-decoding the blood runes. Blood wedding dress patterns fester and regenerate in the space-time dust, double-helix symbols reverse to their endpoint, and the skull key merges with tampered codes to form a spiral blade that pierces Sebastian's immortal body.
The immortal body erupts in a space-time paradox storm: fragments of Sebastian's consciousness mix with annihilation memories of past hosts, roaring to unleash a millennial conspiracy—when the blood contract was signed in the Middle Ages, he colluded with the iron-masked ancestor to tamper with laws. The voluntary annihilation anchor was actually a mechanism to collect host energy. Each generation's sacrifice fueled his recreation of the immortal body. As the contract's guardian, the iron-masked ancestor secretly aided Sebastian in devouring host authority to sustain the cycle.
"The Vessel Catastrophe isn't a curse—it's a power extraction device we designed." The iron-masked ancestor's skull phantom whispers, unleashing alchemical puppet swarms and the Administration's cloned legion. The host's scalpel reverses puppet attacks, her tampering spiral blade disintegrates the legion's particle cannons, and she leaps into the altar's core.
Suddenly, Sebastian's immortal body shows precursors of black hole collapse, mercury tentacles coiling around the host: "The key is invalid! I've sealed the blood contract's origin with millennial energy—unless the host annihilates here voluntarily, injecting core authority into the first blood...!"
The host's mechanical veins absorb raw contract codes, and double-helix symbols erupt into their final form—a purple spiral blade mixed with all hosts' annihilation energy, stabbing into the first blood's core interface. A core-collapse black hole bursts suddenly, engulfing Sebastian's immortal body and the iron-masked ancestor's skull.
Trapped in the blood contract's origin dimension amid the collapsing storm, the host's blood wedding dress disintegrates completely. Mechanical skin patterns are sealed by contract laws, her core anchoring dimension stability. Suddenly, the iron-masked ancestor's skull phantom gives a final roar: "Contract collapse countdown activated, but the blood contract's ultimate key requires the host embryo's voluntary annihilation...!"
The embryo plummets into the future ruin of the Time-Space Administration's headquarters, umbilical cord tangled with the host's residual key codes and the blood contract's first blood. Dark skull patterns reveal the ultimate double-helix symbol—the unlock key for contract collapse. In the ruins, the 15th-generation host awakens as a maiden, the complete logic of contract law dissolution swirling in purple pupils. Her mechanical heart beats in a voice blending all hosts: "Sebastian is devoured, but the Administration still controls the reset program. The first blood's key must embed in the Mechanical Madonna's core while destroying the iron-masked ancestor's guardian laws... The next dimension reveals the Vessel Catastrophe's final battlefield: the meta-dimension hub of the Time-Space Administration."