Profane Lifeleech

(Libris Mortis: The Book of the Dead, page 29, DnD 3.5)

[Divine]

You can channel negative energy to draw the life force from nearby living creatures.

Prerequisite

Ability to rebuke undead

Benefit

As a standard action, you can spend two of your rebuke attempts to deal 1d6 points of damage to all living creatures within a 30-foot burst. This effect can't reduce any creature's current hit points to less than 0. You are healed of an amount of damage equal to the total amount of hit points that you drain from affected creatures, but this healing does not allow you to exceed your full notmal hit point total.

Special

This feat deals no damage to constructs or undead.