Universal Orlando in Florida is celebrating fall by bringing back its “Dark Arts at Hogwarts Castle” event.

The annual event – held in The Wizarding World of Harry Potter – Hogsmeade area of the theme park – will run on select nights starting Sept. 16 through Oct. 31, according to a press release.

The “Dark Arts” experience – which will begin at dusk – includes a light show with special effects and projection mapping on the Hogwarts castle.

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Guests will be able to see images of “unspeakable creatures and sinister villains” – such as dementors, mountain trolls and even Lord Voldemort – appear on the castle, the press release said.

Meanwhile, Death Eaters – the name of Lord Voldemort’s followers – will appear in Hogsmeade and walk among guests.

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The spectacle will end when a Patronus, “a powerful defense charm of concentrated happiness and hope” appears on the castle, the press release said. 

Fans can also buy Dark Arts-themed merchandise – including a Death Eater mask – when they visit The Wizarding World of Harry Potter, according to the press release.