Choose a class you have levels in.  You have increased your spellcasting ability in that class.

Prerequisite: You have more hit dice than you have levels in the chosen class. The chosen class may not be a favoured class.

Benefit: Your spells per day (and spells known for spontaneous casters) for your chosen class are treated as if you were one level higher, but your caster level remains the same.  You may not cast spells of a given level unless your caster level is also high enough to cast them.

Special: You may select this feat more than once.  Its effects do not stack.  Each time you select this feat it applies to a different class.