Arcane Defense( Tome and Blood: A Guidebook to Wizards and Sorcerers, p. 38)
Choose a school of magic, such as Illusion. You can resist spells from that school better than normal.
Spell Focus in the school chosen,
Add +2 to your saving throws against spells of the chosen school.
You can gain this feat multiple times. The effects do not stack. Each time you take the feat, it applies to a new school of magic.