Hermione Confiscates Brain Elixirs

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Harry and Ron are tempted to buy Baruffio's Brain Elixir, a potion that claims to enhance mental agility. However, Hermione steps in, confiscating the potion and later explaining that many black-market items being sold to students during the exam period are fake or dangerous. This sparks a brief argument with Ron over powdered dragon claw, but Hermione convinces them both that none of these items are worth the risk.