"Create a background image inspired by Warhammer Fantasy cover art from the 80s and 90s, with a focus on a demon whose horns are shackled, reflecting a grim, powerful atmosphere. This image should resonate with the bodybuilding and gym community, embodying themes of strength, resilience, and breaking free from constraints. The artwork should capture the essence of the era's art style, using a detailed, dramatic composition that integrates the demon and shackles motif in a way that appeals to an audience passionate about fitness and personal growth."