Conjuring Spells are, presumably, a group of spells that reside in the branch of Transfiguration known as Conjuration and are therefore used to conjure things. Frog-Rabbits are mutations caused by improperly performed Conjuring Spells and explained by the Principle of Artificianimate Quasi-Dominance.
Behind the scenes
- Although it is possible this refers to a group of spells used to conjure things, it is also possible that Professor McGonagall was speaking of an individual spell when mentioning Conjuring Spells, as she also referred to the Vanishing Spell as a plural.
- Harry Potter and the Order of the Phoenix (First mentioned)
- Wonderbook: Book of Spells (First appearance)