Build a grand arcane fortress inspi...

Build a grand arcane fortress inspired by the Draconic Evolution mod. No dragons, focus on magic, energy, and advanced technology. Must fit inside a circle with 50-block diameter. Maximum height 81 blocks. Dark, mystical palette: deep purples, blackstone, deepslate, obsidian-like blocks. Accents: glowing purple energy, arcane runes, crystals. Include a large front entrance. Central open space for Draconic Evolution machinery (reactors, energy cores, storage). Multiple floors and rooms around the core: storage, control, enchanting/ritual rooms, living quarters, balconies. Pointed towers or spires around perimeter (≤ 81 blocks). Exterior should feel grand, powerful, and magical.