Missing rule: Magical and/or other experiments are to be performed in the lab,not the common room.
And this is why my friend and I make a good team. She's Slytherin I'm Ravenclaw
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➜Hogwarts Houses: Ravenclaw ❝ Or yet in wise old Ravenclaw, If you’ve a ready mind, Where those of wit and learning, Will always find their kind. ❞ —The Sorting Hat #hp