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Rat spleen

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A recipient with rat spleens.

Rat spleen is a common ingredient used in the preparation of various potions. It is used in potion-making; it a required ingredient to the Shrinking Solution and Dragon dung Fertiliser.

In 1993, Neville Longbottom added too many rat spleens and too much leech juice into his Shrinking Solution, making it posionous. Hermione Granger helped Neville fix the potion before Professor Snape had a chance to test it on Neville's toad, Trevor.


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