|Formal Name:||Medallion keys|
|First appearance:||Chaos 101|
Each of the teenage heroes found one of these prior to being recruited and sent to New Olympia. They are gold and worn around a chain, and each one is monogrammed with the individual's first initial. They identify the teenagers as heroes, and are used as keys to open the school janitor's door to the secret hide-out of the gods, as well as access the weapons storage and the security system-controlled elevator.