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"Alys, don't forget your rat tail."
Horace Slughorn reminding Alys to take her rat tail with her after a Potions lesson[src]

A rat tail is a the tail of a rat. It was a common potion ingredient and was used in the Hair-Raising Potion.[1]

History[]

During the 1996–1997 school year at Hogwarts, Professor Slughorn reminded first-year Alys not to forget her rat tail after a Potions lesson.[2]

In the first Potions lesson of the 2008–2009 school year, Professor Slughorn asked his students to retrieve some rat tails for the Hair-Raising Potion.[3]

Appearances[]

Notes and references[]