Build the Astroverse central spawn ...

Build the Astroverse central spawn as a 62-block circular celestial mandala. Outer ring: polished deepslate with gold markers. Second ring: dark prismarine with sea lantern dots and compass roses at N/E/S/W. Main visual ring: 4 large prismarine petals with cyan glazed borders and glowing teal glass cores, plus orbit motifs between petals. Inner ring: dark prismarine with 8 backlit amethyst clusters. Center: chiseled quartz floor with a small quartz obelisk tipped with amethyst. From the compass roses, extend 4 primary 6-block-wide ceremonial paths using polished deepslate slab edges, dark prismarine side lanes, and white center lanes. Add banners, lanterns, and a triumphal quartz arch where each path meets its bridge.