Your spells affect more targets and bigger areas than others of your power level.
Prerequisite: Spellcasting attribute 17
Benefit: When determining the number of targets your spell can affect, or the size of its effect or area, you treat your caster level as if it were two higher.
Adventurer’s Handbook: Genius Guide Volume 1. Copyright 2010, Super Genius Games. Authors: Owen K.C. Stephens and Stan!