Mutilator

(Champions of Ruin, page 20, DnD 3.5)

[General]

After striking down your enemy in battle, you can skillfully mutilate the corpse to prevent others from raising it from the dead.

Prerequisite

Base attack bonus +4, any evil alignment

Benefit

After delivering the killing blow to a creature (that is, reducing it to -10 hit points) with a melee weapon, you can decapitate or otherwise hack apart the corpse as a free action. Doing so does not provoke attacks of opportunity and ensures that the creature cannot be revived using a raise dead spell. You can mutilate only one enemy per round in this fashion.