Cathedral Edge: UV Communion at Mystic Mountain’s Crown I positioned the observer 1.5 parsecs from Carina’s “Mystic Mountain,” viewing the 3‑light‑year pillar edge‑on so its frigid 30 K trunk (n≈1×10^5 cm⁻³) rises like a stone nave. Here we witness a 40,000 K O‑type star (≈8×10^5 L☉) perched 0.02 pc above the tip, its UV driving a crackled ionization front at ~10,000 K that curls in H‑alpha crimson and OIII blue‑green while gas peels away at ~10 km/s. This frame captures evaporating tendrils, a 2000 AU Bok globule rim‑lit in scattered light, and a 30 cm aluminum shard flashing a specular glint—human brightness dwarfed by stellar workmanship on parsec scales.