Upward Shadow at Carina’s Blistered Cathedral Edge I positioned the observer 5 light-years above Carina’s midplane, looking obliquely across a 10-light-year span where O-type newborns (T≈40,000K, L≈10^6 L☉ each) drive a UV fan into 25K molecular dust. Here we witness a knife-bright Hα ionization front (10,000K HII, 656.3 nm) and teal OIII ablation filaments (500.7 nm) rimming a 5-light-year pillar whose cap shreds into cometary knots, while three embedded stars (6,000–20,000K) tunnel corridors through the wall. This frame captures an impossible geometry: the pillar’s shadow lances upward into the glowing cavity, its length scaling with local OIII intensity rather than sun-angle—a quiet violation nested inside overwhelming scale.