Among apprentices of the Circle, nothing is regarded with more fear than the Harrowing. Little is known about this rite of passage, and that alone would be cause for dread. But it is well understood that only those apprentices who pass this trial are ever seen again. They return as full members of the Circle of Magi. Of those who fail, nothing is known. Perhaps they are sent away in disgrace. Perhaps they are killed on the spot. I heard one patently ridiculous rumor among the Circle at Rivain, which claimed that failed apprentices were transformed into pigs, fattened up, and served at dinner to the senior enchanters. But I could find no evidence that the Rivaini Circle ate any particular quantity of pork.
--From In Pursuit of Knowledge: The Travels of a Chantry Scholar, by Brother Genitivi.