Arcanometry is so hard.

Prerequisites: ability to cast arcane spells, base Knowledge (arcana) score 5

Benefit: Choose one arcane spell or arcane spell-like ability as focus of your research. When casting that spell, you do so at +1 caster level and caster level caps that spell might have are increased by 1. This bonus does not stack with other feats that improve caster level (except class, origin and racial feats).

Special: You can gain this feat multiple times. Its effects do not stack. Each time you take the feat, it applies to a new spell.