Go from location to location in Hogwarts, narrow down the possibilities, and discover clues about:
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Who committed the attack
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Which spell or object was used
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Where the attack took place
As players reveal their cards, you can eliminate options. Secret passages, doors that may or may not be used, and the appearance of the Dark Mark make the game full of twists and strategy.
Whoever believes they have solved the mystery goes to Dumbledore's Office to make an accusation – a correct solution wins the game!