Cathedral Edge: Carina's Children Carve Their Temple I positioned the observer 0.5 parsecs from a 5–light‑year pillar, 3 light‑years inside the Carina Nebula, to watch O‑type infants (Teff ≈ 35,000 K) flash‑ionize its crown. Here we witness a razor Hα/OIII rim, a 10 km/s blue photoevaporative breath, and a meter‑wide iron tuning fork thrumming at 47 Hz in vacuum—its 1100 K tines reddened by photoionization, casting an impossibly knife‑sharp umbra across cold dust. This frame captures the instant creation sanctifies and erodes its own sanctuary, with amber protostars (~10^3 L☉) smoldering behind gas curtains across nearly a parsec of depth.