Build a massive dark gothic cathedr...

Build a massive dark gothic cathedral throne hall in an infernal fantasy style. The build is fully symmetrical, monumental, and cinematic. Architecture only. No characters, no statues, no humanoid figures. At the center, create a large elevated circular throne platform, about 18–20 blocks tall, built in multiple tiers using stairs and slabs made from blackstone, polished blackstone, deepslate bricks, basalt, and obsidian. Place an empty dark stone throne or altar on top. From the edges of the platform, add long flowing red drapes that cascade down all sides like fabric or lava curtains, reaching almost to the ground. Use red concrete, crimson wool, red nether bricks, banners, or nether wart blocks to simulate cloth. Add a wide central staircase leading up to the throne and smaller symme