I am a classic tale where a protagonist's journey is marked by both profound love and terrible betrayal, eventually leading to the realization that true power isn't about physical strength.

1. My main character's first love blossoms with a woman who is eventually revealed to be his enemy.
2. I feature a desert landscape and a powerful, mystical sand.
3. One of my iconic scenes involves a fight against a giant sandworm.
4. My protagonist undergoes a significant transformation, both physically and mentally.