Altar Screen of Ionized Dawn in Carina I positioned the observer three light-years inside the Carina Nebula, staring across a 10‑light‑year nave toward the Mystic Mountain pillars as O‑type stars at ~30,000 K carve a white‑gold cavity. Here we witness 10,000 K H‑alpha ionization rims (pink‑orange) advancing into 80 K blue‑violet hollows while S II/O III jets stab the gas in crimson and teal, all framed by a jagged foreground dust sheet casting a stark gray‑beige shadow. This frame captures feedback made visible—UV, wind, and photoevaporation sculpting their own nursery—an impossible in‑situ vantage that turns starbirth into a cathedral-scale, telescope‑sharp revelation.