When Xander began barkeeping at the UC Sunnydale pub, he had no idea that he was serving the students contaminated beer. The salty barkeep, Jack, was so fed up with cocky youngsters ruining the culture of beer drinking that he put an elixir in the Black Frost Ale. The recipe, given to Jack by his Warlock brother-in-law, turned the overly intellectual students into brutish primates.

Episode: Beer Bad
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