Write a fantasy story about a young prince who embarks on a quest to find a magical golden key that is said to unlock great power and knowledge

Write a fantasy story about a young prince who embarks on a quest to find a magical golden key that is said to unlock great power and knowledge. Along the way, he encounters mythical creatures, treacherous villains, and tests of bravery and intelligence. Ultimately, he must decide whether the power of the key is worth the sacrifices he must make to obtain it.