A hyper-realistic, ultra-detailed Warhammer 40k style illustration. In the center — a towering Necron Overlord in ancient, burnished metal, illuminated by sickly green necrodermis energy. His eyes glow like dying stars. Behind him stretches a colossal Necron Tomb World: monolithic black structures, pyramids with floating obelisks, green energy conduits, scarab swarms. In the sky — fragmented memories of their past: ghostly silhouettes of crumbling Necrontyr cities, the Great War in the Heavens, shattered C’tan shards chained in dimensional prisons. Foreground: awakened Necron legions marching from stasis crypts, with drifting cryo-fog, flickering hieroglyphs, skeletal constructs activating. Lighting is dramatic, harsh, cinematic — deep shadows, cold green reflections. Composition evokes ancient supremacy, cosmic tragedy, and the return of an unstoppable metal empire. No human figures. Style keywords: ultra-realistic, hyper-detailed, dark sci-fi, cosmic monolithic aesthetic, metallic texture fidelity, cinematic lighting, Warhammer 40k realism, high contrast green glow, monumental scale.