In the gaming system I used in Athron while world-building, I spent a considerable amount of time on the magic system. The nuts and bolts are formed by the spellcraft, rune lore, and alchemy skills augmented with the energy skills. But there is more. Not much more, but a few additional skills I feel are worth mentioning. Specifically, scholars in my system have access to a Scroll Lore skill, Command Item skill, and Item Lore skill.
Scroll Lore allows wizards to create their own scrolls. Basically, the wizard inscribes a spell from a specific spellcraft on a piece of parchment or vellum or what-have-you. Thereafter, the wizard may use the scroll in lieu of casting an actual spell. The advantage comes in the form of an energy savings. A scroll only requires the expenditure of as few as one energy point when it is used. Casting a spell with spellcraft requires far many more. The initial construction of the scroll, of course, requires the same amount of energy as casting the spell, but then the wizard may rest as many days as he likes and restore his energy levels. Such will give him more access to more spells when in the depths of a dungeon with a bevy of scrolls at hand.
Command Item is a skill that allows a wizard (or anyone else with the skill) to summon up and control the magical abilities of an enchanted item. If your sword bursts into flames upon command, it requires an effort of will to activate that function. There is not a guaranteed success to such an activity. No, it is based on a character’s or creature’s Command Item skill or its equivalent. Increasing the skill increases the chance of success.
Item Lore is a skill that allows a wizard (or anyone else with such a skill) to study a magic item that he or she has found over the course of adventuring or in the course of a novel. It requires a certain period of time to examine and study the item in question. If the character does this successfully, he or she will unlock the mysteries of the item and learn all its special abilities and powers.
The final skill in the system is a skill called Magical Lore. This does not translate well into a novel; it is more specifically a gaming skill. Basically, it increases the modifiers bestowed on other skills. For example, a high Magical Lore skill will increase the effectiveness of a character’s Rune Lore or Scroll Lore or what-have-you.
Lastly, the system allows for minor access to the spellcrafts through two additional minor skills. With these skills, the character can gain limited spell abilities. It’s difficult, but not impossible, for a warrior character to gain access to a limited form of flamecraft, or some other spellcraft. Theoretically, a warrior could have normal access to flamecraft, but it is prohibitively expensive in terms of experience and skill slots, so it is almost unheard of. These minor skills are a little easier for non-scholar classes to use than full-fledged full access major skills.