INSPIRED MASTER [GENERAL]
Your search for perfection reveals greater power in the
magic items you use.
Benefit: Any magic item you use is treated as if its caster level were +1 higher than normal. This is not a permanent change to the item and the magic item functions at its normal caster level when used by anyone else. For example, a normal staff of fire with a caster level of 8th functions as it had a caster level of 9th in your hands.
Dragon Magazine #: 339 (Planescape – Dead Factions)