The half-goat-half-devil has been St. Nicholas’s sidekick and enforcer for hundreds of years, warning little Austrian children that they’d better not be naughty. Traditionally he’d only appear once a year and his mask and costume would be more-or-less homemade, but today’s masks have things like glowing LED eyes, and there are Krampus shows with heavy-metal accompaniment that “feels like a rock concert mixed with a rodeo.” — Public Radio International