So question, one of the NPCs I have in line for the party to encounter in a campaign I'm running is an evil cleric. If I gave him the Tomb Tainted Soul from the 3.5 book Libris Mortis, does his channel negative energy ability, when used to harm living creatures do damage to himself?
I would think that it would not harm him, since he is treated as being undead regarding healing and harming with positive and negative energy.
would it still heal him, even though you can normally only hurt or heal with channel energy?