At least some content in this article is derived from information featured in Harry Potter: Hogwarts Mystery. Spoilers will be present within the article.
During the 1988–1989 school year at Hogwarts School of Witchcraft and Wizardry, Professor Severus Snape taught his fifth-years how to concoct this particular brew in Potions class, in preparation for their upcoming Ordinary Wizarding Level.
The potion would later be used by Severus Snape in 1992 to deflate people who had been hit by Goyle's potion, which had exploded out of its cauldron due to Harry Potter throwing a Filibuster firework into it.
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