Feat
Mana Strength
Raises the raw power behind every spell
The character gains +1 caster level. This improvement applies normally to every value based on CL, including damage, duration, range, and Spell DC.
Mana Strength can be learned more than once, and its bonuses stack. The additional CL can help satisfy the caster-level requirement for a higher spell version, but it does not teach that version, provide spell slots, or replace any other prerequisite.