vibrant and colorful digital art composition showing a siege of a medieval castle in winter while two great armies face each other fighting below with banners and flags, catapults throw stones at the castle destroying its stone walls, a huge dragon half covered by clouds of smoke and fog is lightly seen flying in the sky and throwing fire through its jaws, heavy snow storm, dark fantasy, medieval, fire and explosions and grey smoke here and there, trending on Artstation, detailed oil on canvas painting by Greg Rutkowski