"Create a highly detailed, 3D animated promotional artwork of an Infernity Doom Slinger man with a gun, standing on a desolate field. The scene should be set in a dark, mecha-inspired world with a flaming grim reaper and watchers in the background. The Doom Slinger should appear photorealistic, aiming his weapon with a punished Judge Dredd-like look. Incorporate fireworks-safe flaming elements, and feature it on ArtStation with a focus on intricate details, ballistics, and the golden ratio."