Nonlethal Substitution

 
Prerequisite(s): Knowledge (Arcana) 5+ ranks, any other Metamagic feat (See main index)
 
Benefit: Choose one type of energy, you can modify spells with this descriptor to do non-lethal damage. A spell modified this way uses a spell slot one level higher than normal.
 
Source: Book of Exalted Deeds, Complete Arcane