Your spells have the maximum possible effect.
All variable, numeric effects of a spell modified by this feat are maximized. Saving throws and opposed rolls are not affected, nor are spells without random variables. An empowered, maximized spell gains the separate benefits of each feat: the maximum result plus half the normally rolled result.
MP Increase: +3 (a maximized spell costs 3 additional MP more than the actual MP cost of the spell.)