Along with the reveal of Nagini, we see a few other Potter icons including plenty more shots of Hogwarts, Dumbledore looking into the Mirror of Erised, and plenty more references throughout.
Fantastic Beasts: The Crimes of Grindelwald premieres November 16.
One big theory that Rowling herself thought she squashed down years ago, was that Nagini was the boa constrictor from The Reptile House at the London Zoo in the very first film, Harry Potter and the Sorcerer's (Philosopher's) Stone.
Warner Bros. dropped the final Fantastic Beasts sequel trailer on Tuesday, revealing the footage on Twitter and broadcasting live fan reactions on electronic billboards in New York City, Toronto, and Tokyo (via Variety).
Earlier today we got our final look at the new Fantastic Beasts: The Crimes of Grindelwald trailer, and it did not disappoint. Dumbledore tells Scamander, "I can not move against Grindelwald". In addition to the above, it will feature this wonderful buddy right here, who as far as we're concerned is the Most Fantastic Beast.
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It ended with Thomas telling reporters that he doesn't plan to practice for the Seahawks if he doesn't feel like it. After the game, Thomas indicated that several Cowboys coaches told him the team would be trading for him on Monday.
According to this expanded universe, "Nagini can transform from human to snake at will, yet due to her mysterious blood curse she knows that eventually, she'll become a snake permanently", which is why she will eventually be the serpent who helps Voldemort gain strength and becomes his constant companion.
She added: "She wants to stay a human being and I think that's a wonderful contrast to the character". Standing in his way is young Dumbledore (Jude Law), who enlists for this important mission Newt Scamander (Eddie Redmayne) and his friends Tina Goldstein (Katherine Waterston) and Jacob Kowalski (Dan Fogler).
Jamie Campbell Bower is back as young Gellert Grindelwald in the new Fantastic Beasts movie.
Harry Potter fans will instantly recognize this as the name of Lord Voldemort's snake, which the Dark wizard later uses as a Horcrux to preserve part of his soul in his efforts to gain immortality. In a scene taking place at the circus, we hear Credence say "Nagini", and then watch as Kim transforms into the snake.