The phrase refers to attire replicating beings from folklore, legends, and fantasy, designed to be worn on October 31st. Examples include outfits representing dragons, unicorns, griffins, or specific figures like Medusa or a phoenix. These ensembles often incorporate elements such as scales, wings, horns, or other fantastical features to achieve a resemblance to the intended mythical entity.
Adopting such a style for a Halloween celebration provides opportunities for creative expression and imaginative role-play. The selection allows for a unique presence, differentiating the wearer from more common or predictable themes. Historically, the impulse to disguise oneself as fantastical beings during this season taps into ancient traditions of warding off evil spirits by mimicking them.