A small, compact Minecraft Boss Alt...

A small, compact Minecraft Boss Altar, exactly 30x30 blocks in size. The structure must be a fully enclosed dome, just like in the uploaded image. The exterior is made of polished blackstone with gold accents. Inside, it must be a finished 360-degree room with 4 solid walls and a roof, featuring a central gold-and-black throne. Use a palette of only gold blocks, polished blackstone, and honey lanterns. The floor should have a small, symmetric geometric pattern. Ensure the entire 30x30 build is self-contained and closed from all sides, creating a dark and majestic shrine interior. No open gaps, no cutaway views."