Comic-Book Train in a Mighty Fortress

Comic-book style illustration of a steam train barreling through a fortress's inner courtyard, with towering stone walls and crenellated battlements. Bold black ink outlines, vivid primary colors, and halftone shading create a high-contrast, action-packed scene. The train roars along tracks that wind between ancient stone columns and steam-powered machinery; sparks fly and puffs of smoke bloom behind the locomotive. Dramatic low-angle perspective and a dynamic panel layout, with motion lines and word balloons like 'Choo-CHOO!' and 'Intruder!' in bold lettering. Include rivets, gears, and a touch of steampunk fantasy; armored guards in shadows, torches flickering, and a sense of epic adventure crossing between medieval fortress and retro-futuristic design.