Eliana traced the jagged script on the parchment with a thumb. The central drive wheel. Benedetto, in his self-imposed penance, had tethered the very instrument of his ruin to his flesh. Her gaze drifted toward the oak door, picturing him down in his subterranean laboratory, hunched over brass rods, oblivious to the ticking countdown within his marrow. The idea of casually asking to inspect his prosthetic arm, an extension of his own being, was ludicrous. He’d probably vaporize her on the spot. But how else could she find this gear? Livia’s warning was explicit. The curse was *inside* it. She paced the cramped study, amid the tang of sour ink and stale tallow. A stray blueprint lay half-unrolled across the desk, mapping a cross-section of the celestial machine. Amid the tangle of copper conduits and escapements, one component labeled 'Master Resonance Attenuator' served as the central pivot of the entire assembly. “The drive wheel,” she murmured. The part was too complex to sit in an exterior holster; it had to be woven straight into the prosthetic's joint housing. Two floors below, sulfur and scorched solder pooled beneath the vaulted ceiling. Giulia Orsini leaned over a vacant bench, several technical drafts pinned flat under her palms. Unlike her usual taunting demeanor, her expression was one of focused intent, her sharp features softened by the glow of the luminescence-panels. “Your initial calculations for the temporal resonance cascade,” Giulia began, tapping a finger on a diagram, “they were off by a factor of 1.7. The sympathetic vibrations from the Chronos-Core would have amplified exponentially, not linearly.” She looked up, her gaze locking onto Benedetto’s, devoid of malice. “You designed for containment, but the flaw was in the propagation. The power had nowhere to vent but out.” Benedetto, who had been meticulously polishing a delicate aeon-valve, paused, his movements freezing. He had expected an accusation, another salvo in their long-standing academic rivalry. Not an analysis. Not an explanation. His brow furrowed, a silent challenge in his eyes. “The machine fractured because the core reached critical mass before the dampeners could engage,” he said, rough and flat. “The pressure had nowhere to vent, indeed.” He turned the valve over in his scarred palm, blunt thumb following the spiraled grooves. “Precisely,” Giulia affirmed, her voice gaining a quiet confidence. “You tried to contain a deluge by building a stronger dam. The problem wasn’t the dam, Sforza, it was the pressure accumulating behind it. You needed a bypass. A controlled release.” She tapped another coordinate on the draft. “A ring of harmonic resonators could have siphoned the excess temporal charge, dispersing it into the city's grounding lines.” Benedetto glanced from the brass valve to the draft, then up at Giulia. He snatched a charcoal stylus and began marking revisions directly onto a fresh sheet of vellum. His original apparatus had broken against the ceiling of Ostellian alchemy, but her theorem offered an escape hatch. “The Chronos-Core could have been stabilized,” he murmured, almost to himself. “The lives… it could have been prevented.” Giulia leaned against the vice clamp. “It still can be, Sforza. The mathematics hold. The apparatus is salvageable. Just... corrected.” Meanwhile, upstairs, Eliana was plotting. She needed access to that arm. She needed to see the gear. She rehearsed leaning against a door jamb with an airy sigh, testing out a breezy opening line. Each attempt felt stiff as dried starch. She finally decided on a ‘helpful’ approach. Cogsworth trundled down the spiral stair with a tin plate of cold paste and fresh drafting paper. Eliana trailed three paces behind his iron heels. “Oh, Benedetto! I was just... admiring the sleeve assembly! It is magnificent craftwork,” she said, stepping into the stone hall. Giulia arched a brow, while Benedetto froze over the drafting table. “It is functional,” Benedetto stated, his tone flat. He held up a hand, preventing her from getting too close. The prosthetic arm whirred softly, a low hum that seemed to vibrate in the air. “Functional, yes, but artistic too!” Eliana pressed, sidling closer, her gaze fixed on the intricate articulation of his elbow joint. “The way the hydraulic lines run along the ulna plate—it looks almost organic. Do these smaller pinions near the elbow regulate wrist articulation?” She extended a hand toward the casing that concealed the drive wheel. Benedetto jerked backward, his boots scraping flagstones. “Do not touch it, Vettori,” he muttered. In the dark rafters above the crucible, the violet haze coiled tighter around the iron rafters, thickening into an oily smudge. Giulia, observing the exchange, let out a soft snort of amusement. “Careful, Eliana. You might accidentally trigger a self-defense mechanism. Benedetto’s arm has a rather… intimate relationship with its wielder. It doesn’t take kindly to unsolicited advances.” A knowing smirk played on her lips, a hint of something deeper in her eyes as she watched Benedetto’s reaction. Eliana’s cheeks flushed, a warmth spreading through her that wasn't entirely from embarrassment. “I merely wished to observe! For… for academic interest!” she stammered, retreating a step. The accusation of ‘unsolicited advances’ made her stomach clench in a surprising, unpleasant way, a tiny tendril of something hot and unfamiliar coiling in her chest. Benedetto, however, seemed to have recovered from his momentary alarm, his gaze now fixed on Giulia, a silent, challenging question in his eyes. Giulia met it, then shrugged, turning back to the schematics. “Right. Academic interest. Now, Sforza, back to the Chronos-Core. I’ve been reviewing some of Livia’s notes, specifically this one.” She pointed to a barely legible annotation in the margin of one of the partial schematics, a line scribbled in a hasty hand. “She writes: ‘The final stabilizing agent requires Vettori blood.’”

The Rival's Gambit