Fantastic Beasts: The Secrets of Dumbledore, unfortunately, continues a long-running problem with the wizarding world franchise and its magical duels. The Secrets of Dumbledore culminates in a brief duel between the titular character and his enemy Gellert Grindelwald. During this duel, the problems that have plagued wizarding battles since the Harry Potter days rear their heads.
Fantastic Beasts: The Secrets of Dumbledore continues where the last film left off. Dumbledore is searching for a way to oppose Grindelwald without breaking their blood pact which means neither can interfere with the other's affairs. Dumbledore does this by enlisting the help of Newt Scamander, a magizooligist. Towards the end of the film, Dumbledore and Grindelwald's blood pact is broken, allowing the two to engage in a brief duel.
Related: Fantastic Beasts 3: Dumbledore & Grindelwald Backstory Explained
It is in this duel that the problems that have been present in the franchise for a while are highlighted. One of the major ways in which duels between two wizards have been shown across both the Harry Potter franchise, and Fantastic Beasts, is two streams of magic flowing from the duelist's wands, connected at the center. When one of the duelist's magic streams is powerful enough to reach the other, the duel seems to be won. This was the case with the final battle between Voldemort and Harry in Harry Potter and the Deathly Hallows — Part 2, with Harry's Expelliarmus spell reaching the dark wizard, disarming him, and destroying Voldemort for good. The technique is used a lot across Deathly Hallows — Part 2, as well as other action-heavy Potter movies like Harry Potter and the Order of the Phoenix, though never as intensely as Harry and
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