[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.

Rulebook: Libris Mortis (p. 30)

Edition: Supplementals (3.5)