 Gryfflepuff
Andrew practice his spell of several items on his desk. All are okay, no Dark Magic about them.
"Professor, if an item like a cauldron had been used for Dark Magic then would this spell cause it to reveal itself? I guess I am thinking of the story the historian JK Rowling relayed about the graveyard when Harry Potter saw Voldemort come back. I believe a large caulron was used. If the Ministry had been able to find that cauldron just afterward then would this spell caused it to reveal that it had been used for a Dark Arts Potion?"
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