Sword of the Valiant: The Legend of Sir Gawain and the Green Knight

In a castle's great hall during Yuletide, King Arthur halts a feast as he feels ashamed of how lax he and his knights have become during times of peace, questioning the bravery of all knights present. Suddenly, an axe-wielding knight in green armour arrives at the castle, challenging the knights to a game - he challenges them to decapitate him in one swing of his ax, with the caveat that he can return the blow. None of the knights volunteer, leading the king to shame them for their lack of courage, and accept the challenge himself. Finally, Gawain, a young squire, accepts the challenge in lieu of the king, and is swiftly knighted.