A colossal ancient sacred obelisk emerges from a bioluminescent underwater city at midnight, massive weathered obsidian monument with glowing celestial hieroglyphics piercing deep sapphire and emerald twilight depths. Volumetric moonlight rays filter through crystalline waves, illuminating ethereal jellyfish swarms and fallen marble statues of forgotten deities. Deep sapphire, mystic violet and bioluminescent teal palette, epic cinematic wide shot, spiritual mystery meets oceanic abyss, 8K digital art