"A smug, satisfied grin stretched Apollo's lips. "I took Hermes' helmet, melted the mother down, and here you go. An invisibility charm just for you." Apollo dropped the necklace into my palm. It was a reddish-gold color, and a crudely shaped wing was etched into it. "Ha," I said. "It's like Harry Potter and the invisibility cloak." Everyone stared at me."