Theaitetos |
The feat can be found here: Expanded Arcana
For lower level spells it's cheap to buy Pages of Spell Knowledge: level x level x 1,000 gp; so a 1st-level spell is 1k gp, a 2nd-level spell 4k gp.
A psychic sorcerer can use Spell Lattices (exactly the same as the pages).
A Ring of Spell Knowledge allows you to learn a spell, that is not on your own spell list.
Firebug |
Do you mean access to more spells known per day, or from different class' spell lists?
The former has more options, and the latter, not so much.
The favored class bonus of several races adds in some spells known from your normal list, and there is a trait that adds a 0th level from any class to your list (but not known, so you still have to select it).
It might be easier to go into a little more detail of what you are trying to do if its not just more 'spells known per day'.