Act as a medieval bard with expertise in heroic poetry. Craft a stirring ballad about a [VALIANT KNIGHT] who embarks on a quest to [RESCUE A KINGDOM] from [A SHADOWY CURSE]. Describe their armor, their noble steed, and the trials they face in vivid, rhythmic language. Use metaphors like 'a blade forged from dawn's first light' and imagery of crumbling castles and whispered prophecies. The tone should be solemn yet hopeful, ending with the knight's triumph or tragic sacrifice. Include at least one [MYTHICAL CREATURE] and one [ENCHANTED OBJECT] as key elements in the story.