Here is what I am looking at for magic types starting from weakest to strongest:
Magic spells/scrolls-these will be smaller effects like "raven sight" or "darkness" or "dancing light" Think of IQ8/IQ9 spells
Magic wards/symbols-These will be more powerful spell types but requires the sorcerer to spend time crafting the ward and it will activate rather than being cast
Magic Circles-these, like wards, have to be prepared prior to being activated. Circles of protection, of summoning, teleportation...these will be the high IQ powerful stuff...that may requires a sacrifice to power.
As the majority of spells will require a lot of player time/effort to work--how much fun will it be to play/referee this kind of magic system? Considering the normal "spell-slinger" experience will this actually be playable/interesting?