Type: Spellcasting Feat.
Prerequisites: Spell Focus with the chosen school; caster level 4.
Benefit: Choose the same school as your Spell Focus. The saving-throw DC of your spells from that school increases by an additional 1, for a total increase of 2.
You can take this feat more than once. Each time, choose a different school for which you have Spell Focus.
Required for: Greater Spell Focus for the chosen school.