Grimdark Warhammer 40,000 cover art. A Culexus Assassin stands in the foreground on a dead, frozen asteroid. Black, featureless armor absorbs light itself, creating a void-like silhouette. The helmet “Animus Speculum” is partially open, revealing absolute darkness inside — no eyes, no soul, only emptiness. Cold blue-gray ice and cracked stone beneath his feet, ancient Imperial structures half-buried in frost behind him. Reality around the assassin subtly distorts: air bends, light collapses inward, faint warp energy extinguishes near his presence. Psyker symbols and runes in the background fade and fracture as if erased from existence. No flames, no magic — only silence, cold, and negation. Color palette: black, ash gray, dead steel, faint toxic green highlights. Hyper-detailed, realistic, cinematic lighting, oppressive atmosphere, sense of null-field and existential horror. Square composition, album cover quality, no text. Negative prompt (если доступен): bright colors, fire, fantasy magic, heroic pose, chaos symbols, glowing eyes, emotions, cartoon style, low detail, anime, soft lighting
