Practiced Spellcaster( Complete Divine, p. 82)
Choose a spellcasting class that you possess. Your spells cast from that class are more powerful.
Spellcraft 4 ranks,
Your caster level for the chosen spellcasting class increases by +4. This can't increase your caster level beyond your HD. However, even if you can't benefit from the full bonus immediately, if you later gain noncaster-level HD you may be able to apply the rest of the bonus. For example, a human 5th-level cleric/3rd-level fighter who selects this feat would increase his cleric caster level from 5th to 8th (since he has 8 HD). If he later gained a fighter level, he would gain the remainder of the bonus and his cleric caster level would become 9th (since he now has 9 HD). A character with two or more spellcasting classes (such as a bard/sorcerer or a ranger/druid) must choose which class gains the feat's effect. This does not affect your spells per day or spells known. It only increases your caster level, which would help you penetrate SR and increase the duration and other effects of your spells.
You may select this feat multiple times. Each time you choose it, you must apply it to a different spellcasting class. For instance, a 4th-level cleric/5th-level wizard who had selected this feat twice would cast cleric spells as an 8th-level caster and wizard spells as a 9th-level caster.