Ultra-detailed megastructure built ...

Ultra-detailed megastructure built from millions of blocks. Massive futuristic fantasy castle with asymmetrical architecture, thousands of unique towers, bridges, flying buttresses, arches, impossible geometry, huge depth, no flat walls. Exterior walls are made from a seamless rainbow gradient flowing continuously from bright glowing red through orange, yellow, lime, green, cyan, blue, indigo and purple with no interruptions or contrasting materials. The gradient wraps around every surface perfectly. Built from recognizable Minecraft blocks (concrete, stained glass, glazed terracotta, quartz, polished blocks, etc.). Highly saturated, glowing, vibrant, cinematic lighting. Designed to be realistically buildable in Minecraft and exportable as a WorldEdit schematic.