In the Dragon Quest role-playing video game series, there is a piece of equipment named "Hades' helm."
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In the Percy Jackson & the Olympians series by Rick Riordan, Annabeth Chase (a Daughter of Athena) received a New York Yankees baseball cap from her mother that was a disguised cap of invisibility.
Cap of invisibility (aidos kyneê in Greek) is a mysterious helmet or cap that possesses the ability to turn the wearer invisible.
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