Violet Arcanite Colossus

painterly high-fantasy illustration, towering crystal golem made of jagged amethyst and quartz, mid-stride as it smashes a stone pillar with a faceted fist, ancient underground cavern filled with colossal geodes and glowing crystal spires, prismatic light refracting from its body casting shards of color across the walls, ominous and awe-inspiring mood with a hint of arcane mystery, vibrant violet, cyan, and magenta contrasted against deep obsidian shadows, ultra-detailed textures showing cracks, refractions, and embedded runes, digital painting with cinematic realism and subtle volumetric fog