On March 24, cities around the world were filled with thousands of people attending the March for Our Lives. The common thread among all of the rallies? Each event was marked with a flurry of colorful signs depicting powerful, compelling, and witty messages about the dire need to end gun violence.

Among the popular slogans such as "The NRA has blood on its hands" and "Ban guns, not books," there was a trend of Harry Potter–themed signs all across the country. "We grew up on Harry Potter," one sign read, adding: "Of course we're fighting back." Another displayed the message: "If Hogwarts students can defeat the Death Eaters, the U.S. students can defeat the NRA."

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The wizardly motif was prevalent for a good reason; the Harry Potter series conveys a theme of resistance, one that's similar to the fight for change today. Armed with stories of resilience, determination, and the triumph of good over evil, it's no wonder that this generation is ready to push back — and hard. Ahead, check out some of the most powerful Harry Potter signs spotted at yesterday's March for Our Lives, and feel inspired to reread the stories all over again.

Related: The Most Powerful Photos From March for Our Lives Rallies Around the Country