Porcupine to Pin Cushion

"You must form a trusting relationship with your porcupine. It is easier to practice Transfiguration on a willing target."

- Professor McGonagall on the subject matter

Porcupine to Pin Cushion was a Transforming spell (Hystrifors) covered in Hogwarts' Transfiguration classes.

History
During the 1985–1986 school year, the spell was taught to the second year students in Transfiguration.

Etymology
From Latin "hystrix", meaning "porcupine", with the -fors suffix attached.

Behind the scenes

 * This may be related to the Hedgehog to pincushion spell.
 * While the lesson was listed as "Porcupine to Pin Cushion" ("Pin" and "Cushion" written separately) in the game's class directory and the header of the specific lesson; during the lesson itself, the descriptions about "pincushion" were all written as one word:
 * "Porcupine to Pincushion Demonstration"
 * "Memorise Pincushion Shape"
 * "Cast Porcupine to Pincushion"