[PF/3.5] New Feat: Adroit Thaumaturgy (PEACH)

Adroit Thaumaturgy:

Prerequisites: Caster Level 9th, Spell Focus (Any), Spell Penetration

Benefit: Choose a school of magic for which you have the spell focus feat. When casting spells from this chosen school the DC is increased by 1. This bonus stacks with the bonus from spell focus and greater spell focus. Furthermore creatures that have spell resistance have their resistance decreased by 3 against spells you cast from your chosen school.

Special: You can gain this feat multiple times. Its effects do not stack. Each time you take the feat, it applies to a new school of magic for which you have the spell focus feat.