Philosopher

Spells: At first level they choose one school of magic to use and another school to never use. Henceforth they can only learn spells from their chosen school and universal spells, and they can never learn spells from thier disavowed school. At higher levels they may choose additional schools, with each new school they must chose another forbidden school. They cannot cast spells or benefit from magic items enchanted with spells from their forbidden school (this is not a choice on their part, the magic just doesn't work for them). As of first level they do not have the ability to use metamagic feats. They can learn spells from any caster list (except psionics) from scrolls, or through the traditional spell development method (in which case they need an instructor 10 caster levels higher than they are instead of a library worth 10KGP); the spell must belong to a school they can cast from. Spells they learn when leveling up must come from the Sorcerer spell list.

Eschew Materials: They gain this as a bonus feat at first level. They may ignore up to 100GP + 10GP per Level; amounts exceeding that can be paid with XP (1XP = 5GP).

First Metamagic: When they gain their second school, they also gain the ability to use metamagic with their first school, albeit at a slower pace (as a Sorcerer).

Second Metamagic: They can now use metamagic with spells from their second school, and spells from their first school function as if with the Rapid Metamagic feat, enabling them to be used without any change in casting time.

Third Metamagic: They can now use metamagic with spells from their third school, spells from the first and second schools function as if with Rapid Metamagic, and when applying metamagic feats to spells from the first school they automatically Heighten the spell to its new spell level.

Subjective Nihilism: At 20th level the Philosopher realizes that all their posturing has its place, but in the grand scheme of things there is no harm in branching out once in a while. They gain the ability to use spell completion items with spells from their forbidden schools. They also gain the ability to use spells and magic items without alignment restrictions or penalties (does not affect the restrictions of other classes when multiclassing). Although they still maintain their alignment, this is a conscious choice; for all intents and purposes with regard to alignment, the Philosopher may project whatever alignment they believe would be most beneficial to them in any given moment (once per round as a free action) without it affecting their actions.