Behold the Mu-mu min-min build...
Halfling Wizard level 20 (Commoner is way too easy)
Feats: Four bonus feats: Empower Spell, Enlarge Spell, Extend Spell, Heighten Spell,
Level feats: Maximize Spell, Quicken Spell, Silent Spell, Improved Counter Spell, Scribe Scroll, Widen Spell, Spell...