Cinematic wide-angle view of a grand abandoned crystalline underground cave cathedral suspended in infinite obsidian void, massive stalactite formations and flowing underground rivers transformed into flowing liquid chrome mercury with iridescent oil-on-water rainbow oxidation spreading across frozen mineral columns and cascading underground waterfalls, razor-sharp crystalline edges catching violent prismatic sapphire-blue rim light, suspended ancient water droplets and mineral particles dancing in cavernous ethereal glow, deep void background with scattered emerald and obsidian metallic fragments, hyperrealistic 8k render, volumetric lighting carving luminous subterranean cathedral edges from darkness