Design a colossal 2500x2500 fantasy...

Design a colossal 2500x2500 fantasy castle with multiple interconnected levels, towering spires, massive fortified walls, grand halls, bridges, hidden chambers, crypts, and sprawling courtyards. Use blackstone, deepslate, polished basalt, and dark prismarine as the primary materials, with polished quartz for contrast and emerald blocks woven prominently throughout pillars, arches, floors, domes, vaults, towers, and intricate patterns—not merely accents, but not the dominant material. Add glowing green lighting, stained glass, gargoyles, colossal statues, cascading waterfalls, dramatic cliffs, layered depth, custom gradients, and an ancient, intimidating, regal atmosphere.