Energize Spell

(Libris Mortis: The Book of the Dead, page 26, DnD 3.5)

[Metamagic]

Your spells channel positive energy to deal extra damage to undead creatures, but are less effective against other opponents.

Prerequisite

Nonevil alignment, must not have the ability to rebuke undead

Benefit

Your spells are infused with positive energy. An energized spell deals an extra 50% damage to undead creatures, but deals 50% less damage to nonundead creatures and to objects. An energized spell uses up a spell slot one level higher than the spell's actual level.

Special

A character who has the ability to channel negative energy to rebuke or command undead cannot select this feat.