Conan is OGL and low magic, in the sense that there is powerful magic, but every spell and style of sorcery it springs from have prerequisites you must meet in order to learn them. This prevents low level casters from using mighty magics. Spell acquisition is slow; most mid-level sorcerers may know six spells spread out over three different sorcery styles (counterspells, hypnotism, curses, nature, summoning, oriental, divination, prestidigitation, etc.). Each style has a small number of spells which generally must be learned in a specific order before learning the style's most powerful spells.
Only one class can cast magic (Scholars), and they can be priests, witches, demonologists or whatever, though their initial background selection determines the sorcery styles available. Scholars who don't wish to learn magic are made possible by taking featrs or extra skill points instead of new magic. Sorcerers have a small base of power points (PP) with each to cast spells (spontaneously). The base # of PP equal 4 + Wis mod; your max # of PP is equal to double or triple (at 6th level) your base. To get the max, you must ritually sacrifice or torture victims, or drain them 1d4 per person out of willing, unwilling or unwitting targets (damaging their minds by 2d6 Wisdom in the process). There is a "Corruption" system to simulate the descent in evil and madness (benefits and drawbacks abiut similar to the black wizards of Lankhhmar).
There is also a Dabbler feat for those wishing to simulate some with some magic ability without taking levels in scholar. The feat lets you attempt to cast one spell per month, with unpredictable results... This lets you mimic characters like the Gray Mouser without taking levels in Scholar.
Although I haven't gotten much use of Conan's magic system yet (only 1 session into my first Conan campaign), I'm sure it will see some action soon.
