Arcane Savant (Feat)

Your prowess at spell-casting improves with experience. Even totally unrelated experience.

Prerequisites: Arcane caster level 21, Int 23

Benefit: Select one arcane caster class you have in which you have reached a caster level of 21st level or higher. When multiclassing, your caster level in that class uses your total character level instead of your class level. This does not affect any other level-dependent benefits such as bonus feats or spells per day, only your caster level.