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 1990–1991 school year at Hogwarts School of Witchcraft and Wizardry, Professor Minerva McGonagall taught this spell to seventh year students in their first Transfiguration lesson of the school year.
- Harry Potter: Hogwarts Mystery (First appearance)
Notes and references
- Harry Potter: Hogwarts Mystery, Year 7, Chapter 3 (On the Case) - Transfiguration Lesson "Toad to Toadstool"