Concealment charm.

Warner Bros. is keeping Harry Potter TV series filming under wraps by using production codenames and banning mobile phones on set.
IGN

Warner Bros. Games Restructuring to Focus on Harry Potter, Mortal Kombat, and DC Franchises

Warner Bros. Games is restructuring its interactive entertainment endeavors to focus on four key franchises: Mortal Kombat, Harry Potter, DC, and Game of Thrones. Details on the company-wide overhaul ...
fandomwire

Harry Potter and the Goblet of Fire’s One Triwizard Game Rule Reveals the Biggest Plot Hole

Join 100K+ fans and never miss breaking news, fan theories, trailers & exclusive content. Harry Potter and the Goblet of Fire is one of the most exciting books in the whole series. It gave us dragons, ...