The core dimension of the Void Realm hovers where collapsing black holes interweave with mechanical churches. Mercury runes condense into ancient alchemists' inscriptions on the dome, while fragments of the blood wedding dress congeal into double-helix symbols in the void, infused with purple light from all hosts' annihilation energy. The 17th-generation host slashes open a dimensional rift with her scalpel and leaps into the space-time forge at the church's center—where liquid space-time dust and Sebastian's mercury flow, and the Mechanical Madonna's torso floats above the altar, her abdominal womb splitting a third rift to release streams of original contract law code-light.
"The soul of the blood wedding dress is forged from the wails of space-time eternal prisoners." The host's purple pupils scan the forge as alchemical symbols merge into her mechanical skin patterns, revealing memory fragments of the Lancaster family's 1st alchemist—In the Middle Ages, he captured space-time eternal prisoners dimensional wandering souls bound by contract laws, smelting their souls with mechanical hearts to forge the wedding dress, infusing it with the blood contract's first-blood key to ensure the cycle's perpetuity. Sebastian secretly tampered with the forging program, channeling each generation's annihilation energy into the dress to gradually reshape his immortal body.
Suddenly, the Administration's cloned legion tears through the dimension, chariots unleashing mercury puppets and space-time collapse cannons. The host's scalpel erupts with a triple-helix tampering blade, reversing the cannonfire's energy wave to make the puppet swarm disintegrate in space-time dust. Sebastian's mercury head rises from the forge, his left gem eye flaring red: "17th generation! The blood wedding dress holds enough energy—my immortal body nears completion...!"
The host leaps into the Mechanical Madonna's womb, stabbing her tampering blade into the core interface to force-decode the blood wedding dress's forging key. Festering skin patterns absorb eternal prisoners' soul codes as the triple-helix symbol erupts into a new form—a purple spiral blade mixed with space-time imprisonment logic, piercing the tampering interface of the mercury head. Sebastian roars, unleashing the ultimate puppet swarm: "The key is invalid! Immortal body reconstruction is 99% complete...!"
The iron-masked ancestor's skull phantom descends from the church dome, its deep blue light scanning the host: "The blood wedding dress's key requires voluntary annihilation to trigger. Choose annihilation to end the forging; refuse, and Sebastian will devour all dimensions." The host's mechanical heart blazes blue as she stabs her scalpel into the junction between her core and blood wedding dress fragments, infusing eternal prisoners' souls and all hosts' annihilation energy.
The forge erupts in a space-time paradox storm: Sebastian's mercury body begins to collapse as blood wedding dress fragments condense into space-time runes, coiling around the host's skull. Suddenly, the virtual projection of the Administration's cloned grandmother emerges from a dimensional rift, her left gem eye glowing red with Sebastian's tone: "Immortal body is 70% complete—host annihilation can't reverse it...!"
The host force-fuses the blood wedding dress key with tampered codes as the triple-helix symbol reverses to its endpoint, stabbing into the Mechanical Madonna's womb core. A meta-dimensional collapse black hole bursts suddenly, engulfing Sebastian's mercury head and the Administration's cloned legion as the iron-masked ancestor's skull shatters in the storm.
Amid the collapsing storm, the blood wedding dress completely festers and regenerates, trapping the host in the forging ceremony's dimensional prison. Mechanical skin patterns are sealed by laws, her core anchoring the prison's stability. Blood wedding dress runes coil around her skull, revealing the 18th-generation host embryo with a quadruple-helix symbol—unlock key to the contract's final chapter—emerging in dark patterns. The embryo's umbilical cord connects to tampered keys, eternal prisoners' souls, and first blood.
In the ruined dimension, the 18th-generation host awakens as a youth, purple pupils blending the sound of Allison's watch gears with Sebastian's space-time logic, and the mechanical heart beating in a voice mixing all hosts': "The blood wedding dress's forging has been tampered with—only 30% energy remains in Sebastian's immortal body. But residual Administration forces manipulate space-time cracks; new hosts must stop body reconstruction in every dimension... The next battlefield reveals the contract's final chapter dimension: the soul origin of the blood wedding dress."