Thassilonian Specialist

While the concept of wizard specializations along the classically recognized schools of magic certainly dates back to the time of Azlant, and perhaps beyond into the dim recesses of time before humanity rose to prominence, it was the runelords of Thassilon who explored school specialization to its full extreme. Focusing their research on the discovery that each school of magic was opposed by two specific opposition schools, the runelords developed methods of further enhancing their mastery over their chosen arcane specialties. Essentially, they defined these seven schools as much by what they couldn't do as by what they could. By excising "impurities" introduced by fixed oppositional schools, they traded arcane versatility for greater strength in their chosen fields.