Sacred Vengeance
( Libris Mortis: The Book of the Dead, p. 30)[Divine]
You can channel energy to deal extra damage against undead in melee.
Prerequisite
Ability to turn undead,
Benefit
As a free action, spend one of your turn undead attempts to add 2d6 points of damage to all your successful melee attacks against undead until the end of the current round.