This section needs a rewrite
Disciplines are academic groupings based on areas of aptitude within Brakebills.
Despite the fact that affinities are innate Professor Sunderland have said that "[it] has to do with where you were born, and where the moon was, and what the weather was like, and what kind of person you are, plus all kinds of technical stuff that's not worth getting into".  At the end of a Brakebills student's second year, various "inductive" tests are performed by the student to determine which of the Discipline Groups they should be sorted into.
- Physical Magic: Magical ability to manipulate matter.
- Natural Magic: Aptitude for manipulation of nature and the elements.
- Illusion Magic: Magical ability to create and manipulate vivid illusions.
- Knowledge: Alleged magical abilities held by scholars of magic.
- Healing Magic: Aptitude for magical healing.
- Psychic Magic: Magical abilities concerning psychic energies.
List of disciplines
|Camouflage Magic||Plum Purchas||Illusion|
|Minor Mending||Quentin Coldwater||Physical|
Individual Fields of Magic
- Horomancy: Also known as clock magic, it's an obscure discipline that deals with the creation of magical clocks for various effects. Horomancy functions as a sort of magical programming, which the starting point and most obvious effect is manipulation of time, but further study may lead to weather, optics, probabilities and field effects. Stoppard specialized in Horomancy, describing it as the "best of both worlds" when it comes to magic and computers. He showed versatility when he used a clock device to create a force field, shaped like a bubble, around him and the rest of the thief squad . Jane Chatwin was also very gifted in this discipline, but only used it for temporal manipulation, through the use of a pocketwatch given her by the Dwarves of Fillory. 
- Probability Magic: Just as Horomancy allows you to manipulate probabilities, the study is also a discipline of its own. Lionel was an expert in this kind of magic. The discipline deals with altering probability fields, which themselves are inherently invisible, but their secondary effects are observed as chance occurrences that are highly unlikely in normal situations. An example of such is Lionel's effect over it in a cards deck, where a card tossed on the side might land on its edge and balance there, or spin on one corner.
- Sense Magic: This fields of magic is used by talent scouts of Brakebills, and possibly the other magical institutions, to locate acts of magic being performed by potential students. It is typically cast upon globes, allowing for international recruitment, and isn't very reliable for discerning an exact location, but directs the scouts to a magician's general vicinity.