1970s Retro Dark Fantasy Book Cover

1970s retro dark fantasy book cover art, dungeons and dragons style, Low angle, dynamic composition with a muscular armored warrior in the upper right foreground, poised on a stone battlement, swinging a sword downward as he battles multiple figures below. One foe is dramatically flung backward, limbs splayed, while others in horned helmets and shields crowd the lower frame, some raising weapons or climbing the wall. The background blazes with intense orange and yellow firelight, illuminating a massive cylindrical structure and casting stark shadows, smoke swirling above the chaotic melee.