Needs review
Source: Exemplars of Evil

Description: You can make dreadful attacks that disfigure your opponent.

Prerequisites: Evil Alignment, Sneak Attack +2d6

Whenever you make a successful sneak attack on a target creature, you can reduce your extra damage and deal Charisma damage instead. For every 2 dice of extra damage that you sacrifice, your attack deals 1 point of Charisma damage.