Harry Potter author J.K. Rowling worked some of her magic in the muggle world — enchanting a depressed fan who reached out to her on Twitter. The fan, who goes by the handle, @mtrssmustdie, confessed to feeling “sad all the time,” referencing the fictional creatures called Dementors that drain happiness in the Potterverse. “@jk_rowling could you please teach me how to scare the dementors that have been living under my bed?,” the 18-year-old Brazilian tweeted under the pseudonym, pale emo nerd. “I’’m tired of being sad all the time….im tired of panick attacks and my head aching and those dark circles under my eyes.” Rowling had previously told the Sunday Times of London that the Dementors were inspired by her own feelings of depression in her 20s. “I went through a really rough time, and I am quite proud that I got out of that,” Rowling told the British paper in 2008. And the writer penned the perfect calming draught in 140 characters or less. “They’re bothering a unique, valuable human being who deserves happiness. Ask for help. Don’t fight alone. Big hug,” Rowling tweeted. That, and the barrage of encouraging messages from her fellow Potter nerds on social media, seemed to dispel the darkness in the moment. “Oh god, I’m going to sleep now with a big smile on my face,” pale emo nerd tweeted Monday night after the exchange.