The Purple Wizards built this keep on a remote island far from the prying eyes of those who would seek to discover the secrets of their arcane arts. They do occasionally accept students into their ranks, but it requires sponsorship of an alumnus along with a sizable donation. Exceptions have been made in the past but only on rare occasion. They will also hold symposiums on wizardry from time to time, usually when the coffers are running dry. If a capable wizard discovers the location of the keep and brings knowledge of spellcraft unknown to the Purple Wizards (or sufficient coin) they are willing to share their own arcane understanding including the transcription of spells.