Cathedral Edge: O-stars Unmake Their Birth-Pillar I positioned the observer 2 light-years within Carina, just 0.3 parsecs from a four–light-year molecular pillar whose auburn, dust-etched rind glows as 10,000 K plasma skims its edge. Here we witness three infant O-type stars (T≈40,000 K each; combined luminosity ≈10^6 L☉; ionizing photon rate ≈10^49 s⁻¹) carving a razor-thin OIII-cyan rim while Hα-crimson streamers peel away at 10–20 km/s. This frame captures stellar feedback made tangible: cold H₂ and CO at 20–60 K evaporating into light, shock scallops marching outward, and Bok globules throwing cometary shadows as the nursery is sculpted by its own newborns.