Void Deity Descends in Dark Fantasy AI Image Prompt

Dark fantasy style. Dark tone. A void deity descends mid-air—its body composed of dense darkness, with a faint humanoid silhouette. Behind it floats an exaggerated halo, the only bright element in the entire scene, emitting a deep dark-golden glow. The halo illuminates the magic circle patterns below and the weapon in the character's hand. The deity holds a polearm with one hand, its design consistent with the full-body armor, lit by the halo's dark-golden light. Beneath its feet floats a magic circle, its patterns glowing faintly with icy blue light, extremely dim, serving only as a subtle ground decoration. The patterns spread outward, their edges dissolving into darkness. The scene has only two brightness levels: the halo is bright, everything else is dark. The sword and the magic circle are illuminated objects, not light sources.