Generate a scene inspired by the Battle of the Bastards from Game of Thrones

Generate a scene inspired by the Battle of the Bastards from Game of Thrones. Depict a lone warrior, similar to Jon Snow, standing resolutely with his back to the viewer. He holds a sword in his hand, facing an oncoming cavalry charge. The warrior stands on a muddy battlefield, with a cold, overcast sky overhead. The cavalry soldiers are charging towards him on white horses, their armor shining dimly in the muted light. The overall color scheme should reflect the grim and intense atmosphere, with dark, muted blues and grays dominating the scene.