Design a tall arcane fortress inspi...

Design a tall arcane fortress inspired by the Draconic Evolution mod, emphasizing magical energy, advanced technology, and end-game wizard aesthetics. No dragon imagery — the theme is arcane power, energy containment, and high-tech magic. The structure must fit within a perfect circular footprint with a 25-block radius (50-block diameter) in all directions. The main castle body should be tall and imposing, with the maximum build height capped at 81 blocks, including any towers or spires. Use a dark, mystical color palette: deep purples, blacks, dark stone, obsidian-like materials, deepslate, and blackstone. Accents should include glowing purple energy, arcane runes, crystalline highlights, and energy conduits. Required Features: A large, front-facing entrance door integrated into the