Generate a large Minecraft raid are...

Generate a large Minecraft raid arena schematic themed around the Milky Way galaxy and cosmic space. The arena should be approximately 180 blocks wide and circular with a large open battle floor. The floor should resemble a swirling galaxy pattern using dark blocks and glowing stars. Use blocks such as polished blackstone, obsidian, black concrete, amethyst blocks, sea lanterns, and blue or purple stained glass to create a spiral galaxy effect. The arena walls should rise 25–35 blocks tall and contain cosmic pillars, glowing crystals, and nebula themed decorations. Around the upper rim create floating star clusters made from end rods and sea lanterns. Add small floating asteroid islands above the arena for atmosphere. The center of the arena should remain open and flat for raid battl