The lower deck of *The Obsidian Sovereign* contained a state-of-the-art metallurgical laboratory that had been retrofitted overnight into a world-class horological workshop. Precision German lathes, stereo microscopes, sonic cleaning baths, and temperature-controlled vacuum chambers lined the stainless-steel benches. In the center of the room, resting on a velvet-lined hydraulic pedestal beneath halogen spotlights, sat the *Heart of Byzantium*. Isla stood frozen in the doorway, her breath hitching in her throat.…
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