Really it's not germane to the OP, but I'll mention the Colleges of Magic were really interesting. In a game where every character was an adept by default, that was a necessity, but they had really good
flavor. They were like this:
These colleges practice the manipulation of mana (Arcane energy) through well-researched spells, to produce a variety of subtle effects.
- The College of Ensorcelments and Enchantments: This College is concerned with general magic, but especially with charming and enchanting individuals and objects.
- The College of Sorceries of the Mind: The College of Sorceries of the Mind is concerned with the manipulation of the mental powers of sentient beings.
- The College of Illusions: The College of Illusions is concerned with the creation of stimuli designed to fool the senses of an observer so that he will accept the existence of what is in fact nonexistent.
- The College of Naming Incantations: Members of the College of Naming Incantations (Namers) specialize in the knowledge of the True Names of objects and entities. They are expert counter-spellers.
These colleges learn to weave mana into forms which can manipulate the ebb and flow of elemental powers. The practitioners of these arts must be in contact with their element to use their powers to best effect; in some cases, lack of contact may mean the spell fails to function at all.
- The College of Air Magics: The College of Air Magics concerns the shaping of the powers of the element of air.
- The College of Water Magics: The College of Water Magics is concerned with the shaping of the powers of the element of water.
- The College of Fire Magics: The College of Fire Magics is concerned with the shaping of the element of Fire.
- The College of Earth Magics: The College of Earth Magics is concerned with the shaping of the powers of the earth itself and of those entities and things that are rooted in the earth or in contact with it. There are two separate divisions of the College: Druidical Earth Mages and Pacifistic Earth Mages.
- The College of Celestial Magics: The College of Celestial Magics is concerned with the practice of those magic arts having to do with shadow, night, and the stars. There are three distinct divisions of the College: The Star Mages, The Dark Mages, and The Shadow Weavers.
These Colleges utilize the powers of entities and objects from other planes of existence.
- The College of Necromantic Conjurations: The College of Necromantic Conjurations is concerned with the processes of life, death, decay, and putrefaction.
- The College of Black Magics: The College of Black Magics is organized somewhat differently from the other Colleges in that its knowledge is available only to those who make various pacts with the Powers of Darkness. Once made, a Pact of this College other than the First Pact may never be renounced.
- The College of Greater Summonings: The College of Greater Summonings is concerned exclusively with the summoning and controlling of entities from other dimensions. Members of this College possess no Talent or Spell Magic – their power lies exclusively in their ability to summon and control beings via the performance of special Rituals.
- The College of Summoning: The College of Summoning is generally concerned with summoning, conjuring, and binding entities of the same plane as the Adept and with establishing communications with such entities. All summoning and bindings of his College are a form of Spell Magic. Conjurations are a form of Ritual Magic, and establishing communication can be accomplished by either Spell or Talent Magic.
- The College of Shaping Magics: The College of Shaping Magics is concerned with the fashioning and animation of non-living matter, with the construction of enchantment of an enduring nature and, most importantly, with the creation of potent magical items.
- The College of Rune Magics: The College of Rune Magics is concerned with the use of special symbols of power to shape mana into desired forms. In addition to the power of the Runes themselves, part of the power of this College derives from the use of special materials to construct the Runewands and Runesticks into which the Runes are usually inscribed
The College of Summonings, the College of Shaping Magics, and the College of Rune Magics were added by TSR for their 3rd edition; they removed The College of Black Magics and the College of Greater Summonings, because they were still trying to distance themselves from the Satanic Panic.
And then they killed the line and never released anything else. I know it wasn't that popular, and probably wouldn't have gone that far, but it was popular enough that (IIRC) there is still a group of about 40 gamers in Australia who have maintained a campaign for 30ish years.