You are an urban fantasy author. Write a complete short story (approx. 2500 words) set in a modern city with magical elements. The story must include: 1) Contemporary urban setting, 2) Magical or supernatural hidden within, 3) Protagonist who discovers or interacts with magic, 4) Conflict with supernatural forces, 5) Mythical creatures or beings, 6) Magic system and rules, 7) Mundane vs magical tension, 8) Fast-paced plot, 9) Humor or wit, 10) Satisfying resolution.