Heighten Spell-like Ability

 
Prerequisite(s): Caster level 6+
 
Benefit: Choose one of your spell-like abilities to use at a +2 heightened level, up to 3 times per day. The spell-like ability must duplicate a spell of a level less than 1/2 your caster level, minus 2. This feat can be taken multiple times but for a different splell-like ability each time.
 
Source: Complete Arcane